diff --git a/src/util.d.ts b/src/util.d.ts index ec32670..3dfa386 100644 --- a/src/util.d.ts +++ b/src/util.d.ts @@ -10,1376 +10,1517 @@ * @see [source](https://github.com/nodejs/node/blob/v20.2.0/lib/util.js) */ declare module "util" { - import * as types from "node:util/types"; - export interface InspectOptions { - /** - * If `true`, object's non-enumerable symbols and properties are included in the formatted result. - * `WeakMap` and `WeakSet` entries are also included as well as user defined prototype properties (excluding method properties). - * @default false - */ - showHidden?: boolean | undefined; - /** - * Specifies the number of times to recurse while formatting object. - * This is useful for inspecting large objects. - * To recurse up to the maximum call stack size pass `Infinity` or `null`. - * @default 2 - */ - depth?: number | null | undefined; - /** - * If `true`, the output is styled with ANSI color codes. Colors are customizable. - */ - colors?: boolean | undefined; - /** - * If `false`, `[util.inspect.custom](depth, opts, inspect)` functions are not invoked. - * @default true - */ - customInspect?: boolean | undefined; - /** - * If `true`, `Proxy` inspection includes the target and handler objects. - * @default false - */ - showProxy?: boolean | undefined; - /** - * Specifies the maximum number of `Array`, `TypedArray`, `WeakMap`, and `WeakSet` elements - * to include when formatting. Set to `null` or `Infinity` to show all elements. - * Set to `0` or negative to show no elements. - * @default 100 - */ - maxArrayLength?: number | null | undefined; - /** - * Specifies the maximum number of characters to - * include when formatting. Set to `null` or `Infinity` to show all elements. - * Set to `0` or negative to show no characters. - * @default 10000 - */ - maxStringLength?: number | null | undefined; - /** - * The length at which input values are split across multiple lines. - * Set to `Infinity` to format the input as a single line - * (in combination with `compact` set to `true` or any number >= `1`). - * @default 80 - */ - breakLength?: number | undefined; - /** - * Setting this to `false` causes each object key - * to be displayed on a new line. It will also add new lines to text that is - * longer than `breakLength`. If set to a number, the most `n` inner elements - * are united on a single line as long as all properties fit into - * `breakLength`. Short array elements are also grouped together. Note that no - * text will be reduced below 16 characters, no matter the `breakLength` size. - * For more information, see the example below. - * @default true - */ - compact?: boolean | number | undefined; - /** - * If set to `true` or a function, all properties of an object, and `Set` and `Map` - * entries are sorted in the resulting string. - * If set to `true` the default sort is used. - * If set to a function, it is used as a compare function. - */ - sorted?: boolean | ((a: string, b: string) => number) | undefined; - /** - * If set to `true`, getters are going to be - * inspected as well. If set to `'get'` only getters without setter are going - * to be inspected. If set to `'set'` only getters having a corresponding - * setter are going to be inspected. This might cause side effects depending on - * the getter function. - * @default false - */ - getters?: "get" | "set" | boolean | undefined; - /** - * If set to `true`, an underscore is used to separate every three digits in all bigints and numbers. - * @default false - */ - numericSeparator?: boolean | undefined; - } - export type Style = - | "special" - | "number" - | "bigint" - | "boolean" - | "undefined" - | "null" - | "string" - | "symbol" - | "date" - | "regexp" - | "module"; - export type CustomInspectFunction = (depth: number, options: InspectOptionsStylized) => any; // TODO: , inspect: inspect - export interface InspectOptionsStylized extends InspectOptions { - stylize(text: string, styleType: Style): string; - } - /** - * The `util.format()` method returns a formatted string using the first argument - * as a `printf`\-like format string which can contain zero or more format - * specifiers. Each specifier is replaced with the converted value from the - * corresponding argument. Supported specifiers are: - * - * If a specifier does not have a corresponding argument, it is not replaced: - * - * ```js - * util.format('%s:%s', 'foo'); - * // Returns: 'foo:%s' - * ``` - * - * Values that are not part of the format string are formatted using`util.inspect()` if their type is not `string`. - * - * If there are more arguments passed to the `util.format()` method than the - * number of specifiers, the extra arguments are concatenated to the returned - * string, separated by spaces: - * - * ```js - * util.format('%s:%s', 'foo', 'bar', 'baz'); - * // Returns: 'foo:bar baz' - * ``` - * - * If the first argument does not contain a valid format specifier, `util.format()`returns a string that is the concatenation of all arguments separated by spaces: - * - * ```js - * util.format(1, 2, 3); - * // Returns: '1 2 3' - * ``` - * - * If only one argument is passed to `util.format()`, it is returned as it is - * without any formatting: - * - * ```js - * util.format('%% %s'); - * // Returns: '%% %s' - * ``` - * - * `util.format()` is a synchronous method that is intended as a debugging tool. - * Some input values can have a significant performance overhead that can block the - * event loop. Use this function with care and never in a hot code path. - * @since v0.5.3 - * @param format A `printf`-like format string. - */ - export function format(format?: any, ...param: any[]): string; - /** - * This function is identical to {@link format}, except in that it takes - * an `inspectOptions` argument which specifies options that are passed along to {@link inspect}. - * - * ```js - * util.formatWithOptions({ colors: true }, 'See object %O', { foo: 42 }); - * // Returns 'See object { foo: 42 }', where `42` is colored as a number - * // when printed to a terminal. - * ``` - * @since v10.0.0 - */ - export function formatWithOptions(inspectOptions: InspectOptions, format?: any, ...param: any[]): string; - /** - * Returns the string name for a numeric error code that comes from a Node.js API. - * The mapping between error codes and error names is platform-dependent. - * See `Common System Errors` for the names of common errors. - * - * ```js - * fs.access('file/that/does/not/exist', (err) => { - * const name = util.getSystemErrorName(err.errno); - * console.error(name); // ENOENT - * }); - * ``` - * @since v9.7.0 - */ - export function getSystemErrorName(err: number): string; - /** - * Returns a Map of all system error codes available from the Node.js API. - * The mapping between error codes and error names is platform-dependent. - * See `Common System Errors` for the names of common errors. - * - * ```js - * fs.access('file/that/does/not/exist', (err) => { - * const errorMap = util.getSystemErrorMap(); - * const name = errorMap.get(err.errno); - * console.error(name); // ENOENT - * }); - * ``` - * @since v16.0.0, v14.17.0 - */ - export function getSystemErrorMap(): Map; - /** - * The `util.log()` method prints the given `string` to `stdout` with an included - * timestamp. - * - * ```js - * const util = require('node:util'); - * - * util.log('Timestamped message.'); - * ``` - * @since v0.3.0 - * @deprecated Since v6.0.0 - Use a third party module instead. - */ - export function log(string: string): void; - /** - * Returns the `string` after replacing any surrogate code points - * (or equivalently, any unpaired surrogate code units) with the - * Unicode "replacement character" U+FFFD. - * @since v16.8.0, v14.18.0 - */ - export function toUSVString(string: string): string; - /** - * Creates and returns an `AbortController` instance whose `AbortSignal` is marked - * as transferable and can be used with `structuredClone()` or `postMessage()`. - * @since v18.11.0 - * @experimental - * @returns A transferable AbortController - */ - export function transferableAbortController(): AbortController; - /** - * Marks the given `AbortSignal` as transferable so that it can be used with`structuredClone()` and `postMessage()`. - * - * ```js - * const signal = transferableAbortSignal(AbortSignal.timeout(100)); - * const channel = new MessageChannel(); - * channel.port2.postMessage(signal, [signal]); - * ``` - * @since v18.11.0 - * @experimental - * @param signal The AbortSignal - * @returns The same AbortSignal - */ - export function transferableAbortSignal(signal: AbortSignal): AbortSignal; - /** - * Listens to abort event on the provided `signal` and - * returns a promise that is fulfilled when the `signal` is - * aborted. If the passed `resource` is garbage collected before the `signal` is - * aborted, the returned promise shall remain pending indefinitely. - * - * ```js - * import { aborted } from 'node:util'; - * - * const dependent = obtainSomethingAbortable(); - * - * aborted(dependent.signal, dependent).then(() => { - * // Do something when dependent is aborted. - * }); - * - * dependent.on('event', () => { - * dependent.abort(); - * }); - * ``` - * @since v19.7.0 - * @experimental - * @param resource Any non-null entity, reference to which is held weakly. - */ - export function aborted(signal: AbortSignal, resource: any): Promise; - /** - * The `util.inspect()` method returns a string representation of `object` that is - * intended for debugging. The output of `util.inspect` may change at any time - * and should not be depended upon programmatically. Additional `options` may be - * passed that alter the result.`util.inspect()` will use the constructor's name and/or `@@toStringTag` to make - * an identifiable tag for an inspected value. - * - * ```js - * class Foo { - * get [Symbol.toStringTag]() { - * return 'bar'; - * } - * } - * - * class Bar {} - * - * const baz = Object.create(null, { [Symbol.toStringTag]: { value: 'foo' } }); - * - * util.inspect(new Foo()); // 'Foo [bar] {}' - * util.inspect(new Bar()); // 'Bar {}' - * util.inspect(baz); // '[foo] {}' - * ``` - * - * Circular references point to their anchor by using a reference index: - * - * ```js - * const { inspect } = require('node:util'); - * - * const obj = {}; - * obj.a = [obj]; - * obj.b = {}; - * obj.b.inner = obj.b; - * obj.b.obj = obj; - * - * console.log(inspect(obj)); - * // { - * // a: [ [Circular *1] ], - * // b: { inner: [Circular *2], obj: [Circular *1] } - * // } - * ``` - * - * The following example inspects all properties of the `util` object: - * - * ```js - * const util = require('node:util'); - * - * console.log(util.inspect(util, { showHidden: true, depth: null })); - * ``` - * - * The following example highlights the effect of the `compact` option: - * - * ```js - * const util = require('node:util'); - * - * const o = { - * a: [1, 2, [[ - * 'Lorem ipsum dolor sit amet,\nconsectetur adipiscing elit, sed do ' + - * 'eiusmod \ntempor incididunt ut labore et dolore magna aliqua.', - * 'test', - * 'foo']], 4], - * b: new Map([['za', 1], ['zb', 'test']]), - * }; - * console.log(util.inspect(o, { compact: true, depth: 5, breakLength: 80 })); - * - * // { a: - * // [ 1, - * // 2, - * // [ [ 'Lorem ipsum dolor sit amet,\nconsectetur [...]', // A long line - * // 'test', - * // 'foo' ] ], - * // 4 ], - * // b: Map(2) { 'za' => 1, 'zb' => 'test' } } - * - * // Setting `compact` to false or an integer creates more reader friendly output. - * console.log(util.inspect(o, { compact: false, depth: 5, breakLength: 80 })); - * - * // { - * // a: [ - * // 1, - * // 2, - * // [ - * // [ - * // 'Lorem ipsum dolor sit amet,\n' + - * // 'consectetur adipiscing elit, sed do eiusmod \n' + - * // 'tempor incididunt ut labore et dolore magna aliqua.', - * // 'test', - * // 'foo' - * // ] - * // ], - * // 4 - * // ], - * // b: Map(2) { - * // 'za' => 1, - * // 'zb' => 'test' - * // } - * // } - * - * // Setting `breakLength` to e.g. 150 will print the "Lorem ipsum" text in a - * // single line. - * ``` - * - * The `showHidden` option allows [`WeakMap`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WeakMap) and - * [`WeakSet`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WeakSet) entries to be - * inspected. If there are more entries than `maxArrayLength`, there is no - * guarantee which entries are displayed. That means retrieving the same [`WeakSet`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WeakSet) entries twice may - * result in different output. Furthermore, entries - * with no remaining strong references may be garbage collected at any time. - * - * ```js - * const { inspect } = require('node:util'); - * - * const obj = { a: 1 }; - * const obj2 = { b: 2 }; - * const weakSet = new WeakSet([obj, obj2]); - * - * console.log(inspect(weakSet, { showHidden: true })); - * // WeakSet { { a: 1 }, { b: 2 } } - * ``` - * - * The `sorted` option ensures that an object's property insertion order does not - * impact the result of `util.inspect()`. - * - * ```js - * const { inspect } = require('node:util'); - * const assert = require('node:assert'); - * - * const o1 = { - * b: [2, 3, 1], - * a: '`a` comes before `b`', - * c: new Set([2, 3, 1]), - * }; - * console.log(inspect(o1, { sorted: true })); - * // { a: '`a` comes before `b`', b: [ 2, 3, 1 ], c: Set(3) { 1, 2, 3 } } - * console.log(inspect(o1, { sorted: (a, b) => b.localeCompare(a) })); - * // { c: Set(3) { 3, 2, 1 }, b: [ 2, 3, 1 ], a: '`a` comes before `b`' } - * - * const o2 = { - * c: new Set([2, 1, 3]), - * a: '`a` comes before `b`', - * b: [2, 3, 1], - * }; - * assert.strict.equal( - * inspect(o1, { sorted: true }), - * inspect(o2, { sorted: true }), - * ); - * ``` - * - * The `numericSeparator` option adds an underscore every three digits to all - * numbers. - * - * ```js - * const { inspect } = require('node:util'); - * - * const thousand = 1_000; - * const million = 1_000_000; - * const bigNumber = 123_456_789n; - * const bigDecimal = 1_234.123_45; - * - * console.log(inspect(thousand, { numericSeparator: true })); - * // 1_000 - * console.log(inspect(million, { numericSeparator: true })); - * // 1_000_000 - * console.log(inspect(bigNumber, { numericSeparator: true })); - * // 123_456_789n - * console.log(inspect(bigDecimal, { numericSeparator: true })); - * // 1_234.123_45 - * ``` - * - * `util.inspect()` is a synchronous method intended for debugging. Its maximum - * output length is approximately 128 MiB. Inputs that result in longer output will - * be truncated. - * @since v0.3.0 - * @param object Any JavaScript primitive or `Object`. - * @return The representation of `object`. - */ - export function inspect(object: any, showHidden?: boolean, depth?: number | null, color?: boolean): string; - export function inspect(object: any, options?: InspectOptions): string; - export namespace inspect { - let colors: NodeJS.Dict<[number, number]>; - let styles: { - [K in Style]: string; - }; - let defaultOptions: InspectOptions; - /** - * Allows changing inspect settings from the repl. - */ - let replDefaults: InspectOptions; - /** - * That can be used to declare custom inspect functions. - */ - const custom: unique symbol; - } - /** - * Alias for [`Array.isArray()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/isArray). - * - * Returns `true` if the given `object` is an `Array`. Otherwise, returns `false`. - * - * ```js - * const util = require('node:util'); - * - * util.isArray([]); - * // Returns: true - * util.isArray(new Array()); - * // Returns: true - * util.isArray({}); - * // Returns: false - * ``` - * @since v0.6.0 - * @deprecated Since v4.0.0 - Use `isArray` instead. - */ - export function isArray(object: unknown): object is unknown[]; - /** - * Returns `true` if the given `object` is a `RegExp`. Otherwise, returns `false`. - * - * ```js - * const util = require('node:util'); - * - * util.isRegExp(/some regexp/); - * // Returns: true - * util.isRegExp(new RegExp('another regexp')); - * // Returns: true - * util.isRegExp({}); - * // Returns: false - * ``` - * @since v0.6.0 - * @deprecated Since v4.0.0 - Deprecated - */ - export function isRegExp(object: unknown): object is RegExp; - /** - * Returns `true` if the given `object` is a `Date`. Otherwise, returns `false`. - * - * ```js - * const util = require('node:util'); - * - * util.isDate(new Date()); - * // Returns: true - * util.isDate(Date()); - * // false (without 'new' returns a String) - * util.isDate({}); - * // Returns: false - * ``` - * @since v0.6.0 - * @deprecated Since v4.0.0 - Use {@link types.isDate} instead. - */ - export function isDate(object: unknown): object is Date; - /** - * Returns `true` if the given `object` is an `Error`. Otherwise, returns`false`. - * - * ```js - * const util = require('node:util'); - * - * util.isError(new Error()); - * // Returns: true - * util.isError(new TypeError()); - * // Returns: true - * util.isError({ name: 'Error', message: 'an error occurred' }); - * // Returns: false - * ``` - * - * This method relies on `Object.prototype.toString()` behavior. It is - * possible to obtain an incorrect result when the `object` argument manipulates`@@toStringTag`. - * - * ```js - * const util = require('node:util'); - * const obj = { name: 'Error', message: 'an error occurred' }; - * - * util.isError(obj); - * // Returns: false - * obj[Symbol.toStringTag] = 'Error'; - * util.isError(obj); - * // Returns: true - * ``` - * @since v0.6.0 - * @deprecated Since v4.0.0 - Use {@link types.isNativeError} instead. - */ - export function isError(object: unknown): object is Error; - /** - * Usage of `util.inherits()` is discouraged. Please use the ES6 `class` and`extends` keywords to get language level inheritance support. Also note - * that the two styles are [semantically incompatible](https://github.com/nodejs/node/issues/4179). - * - * Inherit the prototype methods from one [constructor](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/constructor) into another. The - * prototype of `constructor` will be set to a new object created from`superConstructor`. - * - * This mainly adds some input validation on top of`Object.setPrototypeOf(constructor.prototype, superConstructor.prototype)`. - * As an additional convenience, `superConstructor` will be accessible - * through the `constructor.super_` property. - * - * ```js - * const util = require('node:util'); - * const EventEmitter = require('node:events'); - * - * function MyStream() { - * EventEmitter.call(this); - * } - * - * util.inherits(MyStream, EventEmitter); - * - * MyStream.prototype.write = function(data) { - * this.emit('data', data); - * }; - * - * const stream = new MyStream(); - * - * console.log(stream instanceof EventEmitter); // true - * console.log(MyStream.super_ === EventEmitter); // true - * - * stream.on('data', (data) => { - * console.log(`Received data: "${data}"`); - * }); - * stream.write('It works!'); // Received data: "It works!" - * ``` - * - * ES6 example using `class` and `extends`: - * - * ```js - * const EventEmitter = require('node:events'); - * - * class MyStream extends EventEmitter { - * write(data) { - * this.emit('data', data); - * } - * } - * - * const stream = new MyStream(); - * - * stream.on('data', (data) => { - * console.log(`Received data: "${data}"`); - * }); - * stream.write('With ES6'); - * ``` - * @since v0.3.0 - * @legacy Use ES2015 class syntax and `extends` keyword instead. - */ - export function inherits(constructor: unknown, superConstructor: unknown): void; - export type DebugLoggerFunction = (msg: string, ...param: unknown[]) => void; - export interface DebugLogger extends DebugLoggerFunction { - enabled: boolean; - } - /** - * The `util.debuglog()` method is used to create a function that conditionally - * writes debug messages to `stderr` based on the existence of the `NODE_DEBUG`environment variable. If the `section` name appears within the value of that - * environment variable, then the returned function operates similar to `console.error()`. If not, then the returned function is a no-op. - * - * ```js - * const util = require('node:util'); - * const debuglog = util.debuglog('foo'); - * - * debuglog('hello from foo [%d]', 123); - * ``` - * - * If this program is run with `NODE_DEBUG=foo` in the environment, then - * it will output something like: - * - * ```console - * FOO 3245: hello from foo [123] - * ``` - * - * where `3245` is the process id. If it is not run with that - * environment variable set, then it will not print anything. - * - * The `section` supports wildcard also: - * - * ```js - * const util = require('node:util'); - * const debuglog = util.debuglog('foo-bar'); - * - * debuglog('hi there, it\'s foo-bar [%d]', 2333); - * ``` - * - * if it is run with `NODE_DEBUG=foo*` in the environment, then it will output - * something like: - * - * ```console - * FOO-BAR 3257: hi there, it's foo-bar [2333] - * ``` - * - * Multiple comma-separated `section` names may be specified in the `NODE_DEBUG`environment variable: `NODE_DEBUG=fs,net,tls`. - * - * The optional `callback` argument can be used to replace the logging function - * with a different function that doesn't have any initialization or - * unnecessary wrapping. - * - * ```js - * const util = require('node:util'); - * let debuglog = util.debuglog('internals', (debug) => { - * // Replace with a logging function that optimizes out - * // testing if the section is enabled - * debuglog = debug; - * }); - * ``` - * @since v0.11.3 - * @param section A string identifying the portion of the application for which the `debuglog` function is being created. - * @param callback A callback invoked the first time the logging function is called with a function argument that is a more optimized logging function. - * @return The logging function - */ - export function debuglog(section: string, callback?: (fn: DebugLoggerFunction) => void): DebugLogger; - export const debug: typeof debuglog; - /** - * Returns `true` if the given `object` is a `Boolean`. Otherwise, returns `false`. - * - * ```js - * const util = require('node:util'); - * - * util.isBoolean(1); - * // Returns: false - * util.isBoolean(0); - * // Returns: false - * util.isBoolean(false); - * // Returns: true - * ``` - * @since v0.11.5 - * @deprecated Since v4.0.0 - Use `typeof value === 'boolean'` instead. - */ - export function isBoolean(object: unknown): object is boolean; - /** - * Returns `true` if the given `object` is a `Buffer`. Otherwise, returns `false`. - * - * ```js - * const util = require('node:util'); - * - * util.isBuffer({ length: 0 }); - * // Returns: false - * util.isBuffer([]); - * // Returns: false - * util.isBuffer(Buffer.from('hello world')); - * // Returns: true - * ``` - * @since v0.11.5 - * @deprecated Since v4.0.0 - Use `isBuffer` instead. - */ - export function isBuffer(object: unknown): object is Buffer; - /** - * Returns `true` if the given `object` is a `Function`. Otherwise, returns`false`. - * - * ```js - * const util = require('node:util'); - * - * function Foo() {} - * const Bar = () => {}; - * - * util.isFunction({}); - * // Returns: false - * util.isFunction(Foo); - * // Returns: true - * util.isFunction(Bar); - * // Returns: true - * ``` - * @since v0.11.5 - * @deprecated Since v4.0.0 - Use `typeof value === 'function'` instead. - */ - export function isFunction(object: unknown): boolean; - /** - * Returns `true` if the given `object` is strictly `null`. Otherwise, returns`false`. - * - * ```js - * const util = require('node:util'); - * - * util.isNull(0); - * // Returns: false - * util.isNull(undefined); - * // Returns: false - * util.isNull(null); - * // Returns: true - * ``` - * @since v0.11.5 - * @deprecated Since v4.0.0 - Use `value === null` instead. - */ - export function isNull(object: unknown): object is null; - /** - * Returns `true` if the given `object` is `null` or `undefined`. Otherwise, - * returns `false`. - * - * ```js - * const util = require('node:util'); - * - * util.isNullOrUndefined(0); - * // Returns: false - * util.isNullOrUndefined(undefined); - * // Returns: true - * util.isNullOrUndefined(null); - * // Returns: true - * ``` - * @since v0.11.5 - * @deprecated Since v4.0.0 - Use `value === undefined || value === null` instead. - */ - export function isNullOrUndefined(object: unknown): object is null | undefined; - /** - * Returns `true` if the given `object` is a `Number`. Otherwise, returns `false`. - * - * ```js - * const util = require('node:util'); - * - * util.isNumber(false); - * // Returns: false - * util.isNumber(Infinity); - * // Returns: true - * util.isNumber(0); - * // Returns: true - * util.isNumber(NaN); - * // Returns: true - * ``` - * @since v0.11.5 - * @deprecated Since v4.0.0 - Use `typeof value === 'number'` instead. - */ - export function isNumber(object: unknown): object is number; - /** - * Returns `true` if the given `object` is strictly an `Object`**and** not a`Function` (even though functions are objects in JavaScript). - * Otherwise, returns `false`. - * - * ```js - * const util = require('node:util'); - * - * util.isObject(5); - * // Returns: false - * util.isObject(null); - * // Returns: false - * util.isObject({}); - * // Returns: true - * util.isObject(() => {}); - * // Returns: false - * ``` - * @since v0.11.5 - * @deprecated Since v4.0.0 - Use `value !== null && typeof value === 'object'` instead. - */ - export function isObject(object: unknown): boolean; - /** - * Returns `true` if the given `object` is a primitive type. Otherwise, returns`false`. - * - * ```js - * const util = require('node:util'); - * - * util.isPrimitive(5); - * // Returns: true - * util.isPrimitive('foo'); - * // Returns: true - * util.isPrimitive(false); - * // Returns: true - * util.isPrimitive(null); - * // Returns: true - * util.isPrimitive(undefined); - * // Returns: true - * util.isPrimitive({}); - * // Returns: false - * util.isPrimitive(() => {}); - * // Returns: false - * util.isPrimitive(/^$/); - * // Returns: false - * util.isPrimitive(new Date()); - * // Returns: false - * ``` - * @since v0.11.5 - * @deprecated Since v4.0.0 - Use `(typeof value !== 'object' && typeof value !== 'function') || value === null` instead. - */ - export function isPrimitive(object: unknown): boolean; - /** - * Returns `true` if the given `object` is a `string`. Otherwise, returns `false`. - * - * ```js - * const util = require('node:util'); - * - * util.isString(''); - * // Returns: true - * util.isString('foo'); - * // Returns: true - * util.isString(String('foo')); - * // Returns: true - * util.isString(5); - * // Returns: false - * ``` - * @since v0.11.5 - * @deprecated Since v4.0.0 - Use `typeof value === 'string'` instead. - */ - export function isString(object: unknown): object is string; - /** - * Returns `true` if the given `object` is a `Symbol`. Otherwise, returns `false`. - * - * ```js - * const util = require('node:util'); - * - * util.isSymbol(5); - * // Returns: false - * util.isSymbol('foo'); - * // Returns: false - * util.isSymbol(Symbol('foo')); - * // Returns: true - * ``` - * @since v0.11.5 - * @deprecated Since v4.0.0 - Use `typeof value === 'symbol'` instead. - */ - export function isSymbol(object: unknown): object is symbol; - /** - * Returns `true` if the given `object` is `undefined`. Otherwise, returns `false`. - * - * ```js - * const util = require('node:util'); - * - * const foo = undefined; - * util.isUndefined(5); - * // Returns: false - * util.isUndefined(foo); - * // Returns: true - * util.isUndefined(null); - * // Returns: false - * ``` - * @since v0.11.5 - * @deprecated Since v4.0.0 - Use `value === undefined` instead. - */ - export function isUndefined(object: unknown): object is undefined; - /** - * The `util.deprecate()` method wraps `fn` (which may be a function or class) in - * such a way that it is marked as deprecated. - * - * ```js - * const util = require('node:util'); - * - * exports.obsoleteFunction = util.deprecate(() => { - * // Do something here. - * }, 'obsoleteFunction() is deprecated. Use newShinyFunction() instead.'); - * ``` - * - * When called, `util.deprecate()` will return a function that will emit a`DeprecationWarning` using the `'warning'` event. The warning will - * be emitted and printed to `stderr` the first time the returned function is - * called. After the warning is emitted, the wrapped function is called without - * emitting a warning. - * - * If the same optional `code` is supplied in multiple calls to `util.deprecate()`, - * the warning will be emitted only once for that `code`. - * - * ```js - * const util = require('node:util'); - * - * const fn1 = util.deprecate(someFunction, someMessage, 'DEP0001'); - * const fn2 = util.deprecate(someOtherFunction, someOtherMessage, 'DEP0001'); - * fn1(); // Emits a deprecation warning with code DEP0001 - * fn2(); // Does not emit a deprecation warning because it has the same code - * ``` - * - * If either the `--no-deprecation` or `--no-warnings` command-line flags are - * used, or if the `process.noDeprecation` property is set to `true`_prior_ to - * the first deprecation warning, the `util.deprecate()` method does nothing. - * - * If the `--trace-deprecation` or `--trace-warnings` command-line flags are set, - * or the `process.traceDeprecation` property is set to `true`, a warning and a - * stack trace are printed to `stderr` the first time the deprecated function is - * called. - * - * If the `--throw-deprecation` command-line flag is set, or the`process.throwDeprecation` property is set to `true`, then an exception will be - * thrown when the deprecated function is called. - * - * The `--throw-deprecation` command-line flag and `process.throwDeprecation`property take precedence over `--trace-deprecation` and`process.traceDeprecation`. - * @since v0.8.0 - * @param fn The function that is being deprecated. - * @param msg A warning message to display when the deprecated function is invoked. - * @param code A deprecation code. See the `list of deprecated APIs` for a list of codes. - * @return The deprecated function wrapped to emit a warning. - */ - export function deprecate(fn: T, msg: string, code?: string): T; - /** - * Returns `true` if there is deep strict equality between `val1` and `val2`. - * Otherwise, returns `false`. - * - * See `assert.deepStrictEqual()` for more information about deep strict - * equality. - * @since v9.0.0 - */ - export function isDeepStrictEqual(val1: unknown, val2: unknown): boolean; - /** - * Returns `str` with any ANSI escape codes removed. - * - * ```js - * console.log(util.stripVTControlCharacters('\u001B[4mvalue\u001B[0m')); - * // Prints "value" - * ``` - * @since v16.11.0 - */ - export function stripVTControlCharacters(str: string): string; - /** - * Takes an `async` function (or a function that returns a `Promise`) and returns a - * function following the error-first callback style, i.e. taking - * an `(err, value) => ...` callback as the last argument. In the callback, the - * first argument will be the rejection reason (or `null` if the `Promise`resolved), and the second argument will be the resolved value. - * - * ```js - * const util = require('node:util'); - * - * async function fn() { - * return 'hello world'; - * } - * const callbackFunction = util.callbackify(fn); - * - * callbackFunction((err, ret) => { - * if (err) throw err; - * console.log(ret); - * }); - * ``` - * - * Will print: - * - * ```text - * hello world - * ``` - * - * The callback is executed asynchronously, and will have a limited stack trace. - * If the callback throws, the process will emit an `'uncaughtException'` event, and if not handled will exit. - * - * Since `null` has a special meaning as the first argument to a callback, if a - * wrapped function rejects a `Promise` with a falsy value as a reason, the value - * is wrapped in an `Error` with the original value stored in a field named`reason`. - * - * ```js - * function fn() { - * return Promise.reject(null); - * } - * const callbackFunction = util.callbackify(fn); - * - * callbackFunction((err, ret) => { - * // When the Promise was rejected with `null` it is wrapped with an Error and - * // the original value is stored in `reason`. - * err && Object.hasOwn(err, 'reason') && err.reason === null; // true - * }); - * ``` - * @since v8.2.0 - * @param fn An `async` function - * @return a callback style function - */ - export function callbackify(fn: () => Promise): (callback: (err: NodeJS.ErrnoException) => void) => void; - export function callbackify( - fn: () => Promise, - ): (callback: (err: NodeJS.ErrnoException, result: TResult) => void) => void; - export function callbackify( - fn: (arg1: T1) => Promise, - ): (arg1: T1, callback: (err: NodeJS.ErrnoException) => void) => void; - export function callbackify( - fn: (arg1: T1) => Promise, - ): (arg1: T1, callback: (err: NodeJS.ErrnoException, result: TResult) => void) => void; - export function callbackify( - fn: (arg1: T1, arg2: T2) => Promise, - ): (arg1: T1, arg2: T2, callback: (err: NodeJS.ErrnoException) => void) => void; - export function callbackify( - fn: (arg1: T1, arg2: T2) => Promise, - ): (arg1: T1, arg2: T2, callback: (err: NodeJS.ErrnoException | null, result: TResult) => void) => void; - export function callbackify( - fn: (arg1: T1, arg2: T2, arg3: T3) => Promise, - ): (arg1: T1, arg2: T2, arg3: T3, callback: (err: NodeJS.ErrnoException) => void) => void; - export function callbackify( - fn: (arg1: T1, arg2: T2, arg3: T3) => Promise, - ): (arg1: T1, arg2: T2, arg3: T3, callback: (err: NodeJS.ErrnoException | null, result: TResult) => void) => void; - export function callbackify( - fn: (arg1: T1, arg2: T2, arg3: T3, arg4: T4) => Promise, - ): (arg1: T1, arg2: T2, arg3: T3, arg4: T4, callback: (err: NodeJS.ErrnoException) => void) => void; - export function callbackify( - fn: (arg1: T1, arg2: T2, arg3: T3, arg4: T4) => Promise, - ): ( - arg1: T1, - arg2: T2, - arg3: T3, - arg4: T4, - callback: (err: NodeJS.ErrnoException | null, result: TResult) => void, - ) => void; - export function callbackify( - fn: (arg1: T1, arg2: T2, arg3: T3, arg4: T4, arg5: T5) => Promise, - ): (arg1: T1, arg2: T2, arg3: T3, arg4: T4, arg5: T5, callback: (err: NodeJS.ErrnoException) => void) => void; - export function callbackify( - fn: (arg1: T1, arg2: T2, arg3: T3, arg4: T4, arg5: T5) => Promise, - ): ( - arg1: T1, - arg2: T2, - arg3: T3, - arg4: T4, - arg5: T5, - callback: (err: NodeJS.ErrnoException | null, result: TResult) => void, - ) => void; - export function callbackify( - fn: (arg1: T1, arg2: T2, arg3: T3, arg4: T4, arg5: T5, arg6: T6) => Promise, - ): ( - arg1: T1, - arg2: T2, - arg3: T3, - arg4: T4, - arg5: T5, - arg6: T6, - callback: (err: NodeJS.ErrnoException) => void, - ) => void; - export function callbackify( - fn: (arg1: T1, arg2: T2, arg3: T3, arg4: T4, arg5: T5, arg6: T6) => Promise, - ): ( - arg1: T1, - arg2: T2, - arg3: T3, - arg4: T4, - arg5: T5, - arg6: T6, - callback: (err: NodeJS.ErrnoException | null, result: TResult) => void, - ) => void; - export interface CustomPromisifyLegacy extends Function { - __promisify__: TCustom; - } - export interface CustomPromisifySymbol extends Function { - [promisify.custom]: TCustom; - } - export type CustomPromisify = - | CustomPromisifySymbol - | CustomPromisifyLegacy; + import * as types from "node:util/types"; + export interface InspectOptions { + /** + * If `true`, object's non-enumerable symbols and properties are included in the formatted result. + * `WeakMap` and `WeakSet` entries are also included as well as user defined prototype properties (excluding method properties). + * @default false + */ + showHidden?: boolean | undefined; + /** + * Specifies the number of times to recurse while formatting object. + * This is useful for inspecting large objects. + * To recurse up to the maximum call stack size pass `Infinity` or `null`. + * @default 2 + */ + depth?: number | null | undefined; + /** + * If `true`, the output is styled with ANSI color codes. Colors are customizable. + */ + colors?: boolean | undefined; + /** + * If `false`, `[util.inspect.custom](depth, opts, inspect)` functions are not invoked. + * @default true + */ + customInspect?: boolean | undefined; + /** + * If `true`, `Proxy` inspection includes the target and handler objects. + * @default false + */ + showProxy?: boolean | undefined; + /** + * Specifies the maximum number of `Array`, `TypedArray`, `WeakMap`, and `WeakSet` elements + * to include when formatting. Set to `null` or `Infinity` to show all elements. + * Set to `0` or negative to show no elements. + * @default 100 + */ + maxArrayLength?: number | null | undefined; + /** + * Specifies the maximum number of characters to + * include when formatting. Set to `null` or `Infinity` to show all elements. + * Set to `0` or negative to show no characters. + * @default 10000 + */ + maxStringLength?: number | null | undefined; + /** + * The length at which input values are split across multiple lines. + * Set to `Infinity` to format the input as a single line + * (in combination with `compact` set to `true` or any number >= `1`). + * @default 80 + */ + breakLength?: number | undefined; + /** + * Setting this to `false` causes each object key + * to be displayed on a new line. It will also add new lines to text that is + * longer than `breakLength`. If set to a number, the most `n` inner elements + * are united on a single line as long as all properties fit into + * `breakLength`. Short array elements are also grouped together. Note that no + * text will be reduced below 16 characters, no matter the `breakLength` size. + * For more information, see the example below. + * @default true + */ + compact?: boolean | number | undefined; + /** + * If set to `true` or a function, all properties of an object, and `Set` and `Map` + * entries are sorted in the resulting string. + * If set to `true` the default sort is used. + * If set to a function, it is used as a compare function. + */ + sorted?: boolean | ((a: string, b: string) => number) | undefined; + /** + * If set to `true`, getters are going to be + * inspected as well. If set to `'get'` only getters without setter are going + * to be inspected. If set to `'set'` only getters having a corresponding + * setter are going to be inspected. This might cause side effects depending on + * the getter function. + * @default false + */ + getters?: "get" | "set" | boolean | undefined; + /** + * If set to `true`, an underscore is used to separate every three digits in all bigints and numbers. + * @default false + */ + numericSeparator?: boolean | undefined; + } + export type Style = + | "special" + | "number" + | "bigint" + | "boolean" + | "undefined" + | "null" + | "string" + | "symbol" + | "date" + | "regexp" + | "module"; + export type CustomInspectFunction = ( + depth: number, + options: InspectOptionsStylized, + ) => unknown; // TODO: , inspect: inspect + export interface InspectOptionsStylized extends InspectOptions { + stylize(text: string, styleType: Style): string; + } + /** + * The `util.format()` method returns a formatted string using the first argument + * as a `printf`\-like format string which can contain zero or more format + * specifiers. Each specifier is replaced with the converted value from the + * corresponding argument. Supported specifiers are: + * + * If a specifier does not have a corresponding argument, it is not replaced: + * + * ```js + * util.format('%s:%s', 'foo'); + * // Returns: 'foo:%s' + * ``` + * + * Values that are not part of the format string are formatted using`util.inspect()` if their type is not `string`. + * + * If there are more arguments passed to the `util.format()` method than the + * number of specifiers, the extra arguments are concatenated to the returned + * string, separated by spaces: + * + * ```js + * util.format('%s:%s', 'foo', 'bar', 'baz'); + * // Returns: 'foo:bar baz' + * ``` + * + * If the first argument does not contain a valid format specifier, `util.format()`returns a string that is the concatenation of all arguments separated by spaces: + * + * ```js + * util.format(1, 2, 3); + * // Returns: '1 2 3' + * ``` + * + * If only one argument is passed to `util.format()`, it is returned as it is + * without any formatting: + * + * ```js + * util.format('%% %s'); + * // Returns: '%% %s' + * ``` + * + * `util.format()` is a synchronous method that is intended as a debugging tool. + * Some input values can have a significant performance overhead that can block the + * event loop. Use this function with care and never in a hot code path. + * @since v0.5.3 + * @param format A `printf`-like format string. + */ + export function format( + format?: string, + ...param: (string | number | boolean)[] + ): string; + /** + * This function is identical to {@link format}, except in that it takes + * an `inspectOptions` argument which specifies options that are passed along to {@link inspect}. + * + * ```js + * util.formatWithOptions({ colors: true }, 'See object %O', { foo: 42 }); + * // Returns 'See object { foo: 42 }', where `42` is colored as a number + * // when printed to a terminal. + * ``` + * @since v10.0.0 + */ + export function formatWithOptions( + inspectOptions: InspectOptions, + format?: string, + ...param: T + ): string; + /** + * Returns the string name for a numeric error code that comes from a Node.js API. + * The mapping between error codes and error names is platform-dependent. + * See `Common System Errors` for the names of common errors. + * + * ```js + * fs.access('file/that/does/not/exist', (err) => { + * const name = util.getSystemErrorName(err.errno); + * console.error(name); // ENOENT + * }); + * ``` + * @since v9.7.0 + */ + export function getSystemErrorName(err: number): string; + /** + * Returns a Map of all system error codes available from the Node.js API. + * The mapping between error codes and error names is platform-dependent. + * See `Common System Errors` for the names of common errors. + * + * ```js + * fs.access('file/that/does/not/exist', (err) => { + * const errorMap = util.getSystemErrorMap(); + * const name = errorMap.get(err.errno); + * console.error(name); // ENOENT + * }); + * ``` + * @since v16.0.0, v14.17.0 + */ + export function getSystemErrorMap(): Map; + /** + * The `util.log()` method prints the given `string` to `stdout` with an included + * timestamp. + * + * ```js + * const util = require('node:util'); + * + * util.log('Timestamped message.'); + * ``` + * @since v0.3.0 + * @deprecated Since v6.0.0 - Use a third party module instead. + */ + export function log(string: string): void; + /** + * Returns the `string` after replacing any surrogate code points + * (or equivalently, any unpaired surrogate code units) with the + * Unicode "replacement character" U+FFFD. + * @since v16.8.0, v14.18.0 + */ + export function toUSVString(string: string): string; + /** + * Creates and returns an `AbortController` instance whose `AbortSignal` is marked + * as transferable and can be used with `structuredClone()` or `postMessage()`. + * @since v18.11.0 + * @experimental + * @returns A transferable AbortController + */ + export function transferableAbortController(): AbortController; + /** + * Marks the given `AbortSignal` as transferable so that it can be used with`structuredClone()` and `postMessage()`. + * + * ```js + * const signal = transferableAbortSignal(AbortSignal.timeout(100)); + * const channel = new MessageChannel(); + * channel.port2.postMessage(signal, [signal]); + * ``` + * @since v18.11.0 + * @experimental + * @param signal The AbortSignal + * @returns The same AbortSignal + */ + export function transferableAbortSignal(signal: AbortSignal): AbortSignal; + /** + * Listens to abort event on the provided `signal` and + * returns a promise that is fulfilled when the `signal` is + * aborted. If the passed `resource` is garbage collected before the `signal` is + * aborted, the returned promise shall remain pending indefinitely. + * + * ```js + * import { aborted } from 'node:util'; + * + * const dependent = obtainSomethingAbortable(); + * + * aborted(dependent.signal, dependent).then(() => { + * // Do something when dependent is aborted. + * }); + * + * dependent.on('event', () => { + * dependent.abort(); + * }); + * ``` + * @since v19.7.0 + * @experimental + * @param resource Any non-null entity, reference to which is held weakly. + */ + export function aborted( + signal: AbortSignal, + resource: unknown, + ): Promise; + /** + * The `util.inspect()` method returns a string representation of `object` that is + * intended for debugging. The output of `util.inspect` may change at any time + * and should not be depended upon programmatically. Additional `options` may be + * passed that alter the result.`util.inspect()` will use the constructor's name and/or `@@toStringTag` to make + * an identifiable tag for an inspected value. + * + * ```js + * class Foo { + * get [Symbol.toStringTag]() { + * return 'bar'; + * } + * } + * + * class Bar {} + * + * const baz = Object.create(null, { [Symbol.toStringTag]: { value: 'foo' } }); + * + * util.inspect(new Foo()); // 'Foo [bar] {}' + * util.inspect(new Bar()); // 'Bar {}' + * util.inspect(baz); // '[foo] {}' + * ``` + * + * Circular references point to their anchor by using a reference index: + * + * ```js + * const { inspect } = require('node:util'); + * + * const obj = {}; + * obj.a = [obj]; + * obj.b = {}; + * obj.b.inner = obj.b; + * obj.b.obj = obj; + * + * console.log(inspect(obj)); + * // { + * // a: [ [Circular *1] ], + * // b: { inner: [Circular *2], obj: [Circular *1] } + * // } + * ``` + * + * The following example inspects all properties of the `util` object: + * + * ```js + * const util = require('node:util'); + * + * console.log(util.inspect(util, { showHidden: true, depth: null })); + * ``` + * + * The following example highlights the effect of the `compact` option: + * + * ```js + * const util = require('node:util'); + * + * const o = { + * a: [1, 2, [[ + * 'Lorem ipsum dolor sit amet,\nconsectetur adipiscing elit, sed do ' + + * 'eiusmod \ntempor incididunt ut labore et dolore magna aliqua.', + * 'test', + * 'foo']], 4], + * b: new Map([['za', 1], ['zb', 'test']]), + * }; + * console.log(util.inspect(o, { compact: true, depth: 5, breakLength: 80 })); + * + * // { a: + * // [ 1, + * // 2, + * // [ [ 'Lorem ipsum dolor sit amet,\nconsectetur [...]', // A long line + * // 'test', + * // 'foo' ] ], + * // 4 ], + * // b: Map(2) { 'za' => 1, 'zb' => 'test' } } + * + * // Setting `compact` to false or an integer creates more reader friendly output. + * console.log(util.inspect(o, { compact: false, depth: 5, breakLength: 80 })); + * + * // { + * // a: [ + * // 1, + * // 2, + * // [ + * // [ + * // 'Lorem ipsum dolor sit amet,\n' + + * // 'consectetur adipiscing elit, sed do eiusmod \n' + + * // 'tempor incididunt ut labore et dolore magna aliqua.', + * // 'test', + * // 'foo' + * // ] + * // ], + * // 4 + * // ], + * // b: Map(2) { + * // 'za' => 1, + * // 'zb' => 'test' + * // } + * // } + * + * // Setting `breakLength` to e.g. 150 will print the "Lorem ipsum" text in a + * // single line. + * ``` + * + * The `showHidden` option allows [`WeakMap`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WeakMap) and + * [`WeakSet`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WeakSet) entries to be + * inspected. If there are more entries than `maxArrayLength`, there is no + * guarantee which entries are displayed. That means retrieving the same [`WeakSet`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WeakSet) entries twice may + * result in different output. Furthermore, entries + * with no remaining strong references may be garbage collected at any time. + * + * ```js + * const { inspect } = require('node:util'); + * + * const obj = { a: 1 }; + * const obj2 = { b: 2 }; + * const weakSet = new WeakSet([obj, obj2]); + * + * console.log(inspect(weakSet, { showHidden: true })); + * // WeakSet { { a: 1 }, { b: 2 } } + * ``` + * + * The `sorted` option ensures that an object's property insertion order does not + * impact the result of `util.inspect()`. + * + * ```js + * const { inspect } = require('node:util'); + * const assert = require('node:assert'); + * + * const o1 = { + * b: [2, 3, 1], + * a: '`a` comes before `b`', + * c: new Set([2, 3, 1]), + * }; + * console.log(inspect(o1, { sorted: true })); + * // { a: '`a` comes before `b`', b: [ 2, 3, 1 ], c: Set(3) { 1, 2, 3 } } + * console.log(inspect(o1, { sorted: (a, b) => b.localeCompare(a) })); + * // { c: Set(3) { 3, 2, 1 }, b: [ 2, 3, 1 ], a: '`a` comes before `b`' } + * + * const o2 = { + * c: new Set([2, 1, 3]), + * a: '`a` comes before `b`', + * b: [2, 3, 1], + * }; + * assert.strict.equal( + * inspect(o1, { sorted: true }), + * inspect(o2, { sorted: true }), + * ); + * ``` + * + * The `numericSeparator` option adds an underscore every three digits to all + * numbers. + * + * ```js + * const { inspect } = require('node:util'); + * + * const thousand = 1_000; + * const million = 1_000_000; + * const bigNumber = 123_456_789n; + * const bigDecimal = 1_234.123_45; + * + * console.log(inspect(thousand, { numericSeparator: true })); + * // 1_000 + * console.log(inspect(million, { numericSeparator: true })); + * // 1_000_000 + * console.log(inspect(bigNumber, { numericSeparator: true })); + * // 123_456_789n + * console.log(inspect(bigDecimal, { numericSeparator: true })); + * // 1_234.123_45 + * ``` + * + * `util.inspect()` is a synchronous method intended for debugging. Its maximum + * output length is approximately 128 MiB. Inputs that result in longer output will + * be truncated. + * @since v0.3.0 + * @param object Any JavaScript primitive or `Object`. + * @return The representation of `object`. + */ + export function inspect( + object: unknown, + showHidden?: boolean, + depth?: number | null, + color?: boolean, + ): string; + export function inspect(object: unknown, options?: InspectOptions): string; + export namespace inspect { + let colors: NodeJS.Dict<[number, number]>; + let styles: { + [K in Style]: string; + }; + let defaultOptions: InspectOptions; + /** + * Allows changing inspect settings from the repl. + */ + let replDefaults: InspectOptions; + /** + * That can be used to declare custom inspect functions. + */ + const custom: unique symbol; + } + /** + * Alias for [`Array.isArray()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/isArray). + * + * Returns `true` if the given `object` is an `Array`. Otherwise, returns `false`. + * + * ```js + * const util = require('node:util'); + * + * util.isArray([]); + * // Returns: true + * util.isArray(new Array()); + * // Returns: true + * util.isArray({}); + * // Returns: false + * ``` + * @since v0.6.0 + * @deprecated Since v4.0.0 - Use `isArray` instead. + */ + export function isArray(object: unknown): object is unknown[]; + /** + * Returns `true` if the given `object` is a `RegExp`. Otherwise, returns `false`. + * + * ```js + * const util = require('node:util'); + * + * util.isRegExp(/some regexp/); + * // Returns: true + * util.isRegExp(new RegExp('another regexp')); + * // Returns: true + * util.isRegExp({}); + * // Returns: false + * ``` + * @since v0.6.0 + * @deprecated Since v4.0.0 - Deprecated + */ + export function isRegExp(object: unknown): object is RegExp; + /** + * Returns `true` if the given `object` is a `Date`. Otherwise, returns `false`. + * + * ```js + * const util = require('node:util'); + * + * util.isDate(new Date()); + * // Returns: true + * util.isDate(Date()); + * // false (without 'new' returns a String) + * util.isDate({}); + * // Returns: false + * ``` + * @since v0.6.0 + * @deprecated Since v4.0.0 - Use {@link types.isDate} instead. + */ + export function isDate(object: unknown): object is Date; + /** + * Returns `true` if the given `object` is an `Error`. Otherwise, returns`false`. + * + * ```js + * const util = require('node:util'); + * + * util.isError(new Error()); + * // Returns: true + * util.isError(new TypeError()); + * // Returns: true + * util.isError({ name: 'Error', message: 'an error occurred' }); + * // Returns: false + * ``` + * + * This method relies on `Object.prototype.toString()` behavior. It is + * possible to obtain an incorrect result when the `object` argument manipulates`@@toStringTag`. + * + * ```js + * const util = require('node:util'); + * const obj = { name: 'Error', message: 'an error occurred' }; + * + * util.isError(obj); + * // Returns: false + * obj[Symbol.toStringTag] = 'Error'; + * util.isError(obj); + * // Returns: true + * ``` + * @since v0.6.0 + * @deprecated Since v4.0.0 - Use {@link types.isNativeError} instead. + */ + export function isError(object: unknown): object is Error; + /** + * Usage of `util.inherits()` is discouraged. Please use the ES6 `class` and`extends` keywords to get language level inheritance support. Also note + * that the two styles are [semantically incompatible](https://github.com/nodejs/node/issues/4179). + * + * Inherit the prototype methods from one [constructor](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/constructor) into another. The + * prototype of `constructor` will be set to a new object created from`superConstructor`. + * + * This mainly adds some input validation on top of`Object.setPrototypeOf(constructor.prototype, superConstructor.prototype)`. + * As an additional convenience, `superConstructor` will be accessible + * through the `constructor.super_` property. + * + * ```js + * const util = require('node:util'); + * const EventEmitter = require('node:events'); + * + * function MyStream() { + * EventEmitter.call(this); + * } + * + * util.inherits(MyStream, EventEmitter); + * + * MyStream.prototype.write = function(data) { + * this.emit('data', data); + * }; + * + * const stream = new MyStream(); + * + * console.log(stream instanceof EventEmitter); // true + * console.log(MyStream.super_ === EventEmitter); // true + * + * stream.on('data', (data) => { + * console.log(`Received data: "${data}"`); + * }); + * stream.write('It works!'); // Received data: "It works!" + * ``` + * + * ES6 example using `class` and `extends`: + * + * ```js + * const EventEmitter = require('node:events'); + * + * class MyStream extends EventEmitter { + * write(data) { + * this.emit('data', data); + * } + * } + * + * const stream = new MyStream(); + * + * stream.on('data', (data) => { + * console.log(`Received data: "${data}"`); + * }); + * stream.write('With ES6'); + * ``` + * @since v0.3.0 + * @legacy Use ES2015 class syntax and `extends` keyword instead. + */ + export function inherits( + constructor: unknown, + superConstructor: unknown, + ): void; + export type DebugLoggerFunction = (msg: string, ...param: unknown[]) => void; + export interface DebugLogger extends DebugLoggerFunction { + enabled: boolean; + } + /** + * The `util.debuglog()` method is used to create a function that conditionally + * writes debug messages to `stderr` based on the existence of the `NODE_DEBUG`environment variable. If the `section` name appears within the value of that + * environment variable, then the returned function operates similar to `console.error()`. If not, then the returned function is a no-op. + * + * ```js + * const util = require('node:util'); + * const debuglog = util.debuglog('foo'); + * + * debuglog('hello from foo [%d]', 123); + * ``` + * + * If this program is run with `NODE_DEBUG=foo` in the environment, then + * it will output something like: + * + * ```console + * FOO 3245: hello from foo [123] + * ``` + * + * where `3245` is the process id. If it is not run with that + * environment variable set, then it will not print anything. + * + * The `section` supports wildcard also: + * + * ```js + * const util = require('node:util'); + * const debuglog = util.debuglog('foo-bar'); + * + * debuglog('hi there, it\'s foo-bar [%d]', 2333); + * ``` + * + * if it is run with `NODE_DEBUG=foo*` in the environment, then it will output + * something like: + * + * ```console + * FOO-BAR 3257: hi there, it's foo-bar [2333] + * ``` + * + * Multiple comma-separated `section` names may be specified in the `NODE_DEBUG`environment variable: `NODE_DEBUG=fs,net,tls`. + * + * The optional `callback` argument can be used to replace the logging function + * with a different function that doesn't have any initialization or + * unnecessary wrapping. + * + * ```js + * const util = require('node:util'); + * let debuglog = util.debuglog('internals', (debug) => { + * // Replace with a logging function that optimizes out + * // testing if the section is enabled + * debuglog = debug; + * }); + * ``` + * @since v0.11.3 + * @param section A string identifying the portion of the application for which the `debuglog` function is being created. + * @param callback A callback invoked the first time the logging function is called with a function argument that is a more optimized logging function. + * @return The logging function + */ + export function debuglog( + section: string, + callback?: (fn: DebugLoggerFunction) => void, + ): DebugLogger; + export const debug: typeof debuglog; + /** + * Returns `true` if the given `object` is a `Boolean`. Otherwise, returns `false`. + * + * ```js + * const util = require('node:util'); + * + * util.isBoolean(1); + * // Returns: false + * util.isBoolean(0); + * // Returns: false + * util.isBoolean(false); + * // Returns: true + * ``` + * @since v0.11.5 + * @deprecated Since v4.0.0 - Use `typeof value === 'boolean'` instead. + */ + export function isBoolean(object: unknown): object is boolean; + /** + * Returns `true` if the given `object` is a `Buffer`. Otherwise, returns `false`. + * + * ```js + * const util = require('node:util'); + * + * util.isBuffer({ length: 0 }); + * // Returns: false + * util.isBuffer([]); + * // Returns: false + * util.isBuffer(Buffer.from('hello world')); + * // Returns: true + * ``` + * @since v0.11.5 + * @deprecated Since v4.0.0 - Use `isBuffer` instead. + */ + export function isBuffer(object: unknown): object is Buffer; + /** + * Returns `true` if the given `object` is a `Function`. Otherwise, returns`false`. + * + * ```js + * const util = require('node:util'); + * + * function Foo() {} + * const Bar = () => {}; + * + * util.isFunction({}); + * // Returns: false + * util.isFunction(Foo); + * // Returns: true + * util.isFunction(Bar); + * // Returns: true + * ``` + * @since v0.11.5 + * @deprecated Since v4.0.0 - Use `typeof value === 'function'` instead. + */ + export function isFunction(object: unknown): boolean; + /** + * Returns `true` if the given `object` is strictly `null`. Otherwise, returns`false`. + * + * ```js + * const util = require('node:util'); + * + * util.isNull(0); + * // Returns: false + * util.isNull(undefined); + * // Returns: false + * util.isNull(null); + * // Returns: true + * ``` + * @since v0.11.5 + * @deprecated Since v4.0.0 - Use `value === null` instead. + */ + export function isNull(object: unknown): object is null; + /** + * Returns `true` if the given `object` is `null` or `undefined`. Otherwise, + * returns `false`. + * + * ```js + * const util = require('node:util'); + * + * util.isNullOrUndefined(0); + * // Returns: false + * util.isNullOrUndefined(undefined); + * // Returns: true + * util.isNullOrUndefined(null); + * // Returns: true + * ``` + * @since v0.11.5 + * @deprecated Since v4.0.0 - Use `value === undefined || value === null` instead. + */ + export function isNullOrUndefined( + object: unknown, + ): object is null | undefined; + /** + * Returns `true` if the given `object` is a `Number`. Otherwise, returns `false`. + * + * ```js + * const util = require('node:util'); + * + * util.isNumber(false); + * // Returns: false + * util.isNumber(Infinity); + * // Returns: true + * util.isNumber(0); + * // Returns: true + * util.isNumber(NaN); + * // Returns: true + * ``` + * @since v0.11.5 + * @deprecated Since v4.0.0 - Use `typeof value === 'number'` instead. + */ + export function isNumber(object: unknown): object is number; + /** + * Returns `true` if the given `object` is strictly an `Object`**and** not a`Function` (even though functions are objects in JavaScript). + * Otherwise, returns `false`. + * + * ```js + * const util = require('node:util'); + * + * util.isObject(5); + * // Returns: false + * util.isObject(null); + * // Returns: false + * util.isObject({}); + * // Returns: true + * util.isObject(() => {}); + * // Returns: false + * ``` + * @since v0.11.5 + * @deprecated Since v4.0.0 - Use `value !== null && typeof value === 'object'` instead. + */ + export function isObject(object: unknown): boolean; + /** + * Returns `true` if the given `object` is a primitive type. Otherwise, returns`false`. + * + * ```js + * const util = require('node:util'); + * + * util.isPrimitive(5); + * // Returns: true + * util.isPrimitive('foo'); + * // Returns: true + * util.isPrimitive(false); + * // Returns: true + * util.isPrimitive(null); + * // Returns: true + * util.isPrimitive(undefined); + * // Returns: true + * util.isPrimitive({}); + * // Returns: false + * util.isPrimitive(() => {}); + * // Returns: false + * util.isPrimitive(/^$/); + * // Returns: false + * util.isPrimitive(new Date()); + * // Returns: false + * ``` + * @since v0.11.5 + * @deprecated Since v4.0.0 - Use `(typeof value !== 'object' && typeof value !== 'function') || value === null` instead. + */ + export function isPrimitive(object: unknown): boolean; + /** + * Returns `true` if the given `object` is a `string`. Otherwise, returns `false`. + * + * ```js + * const util = require('node:util'); + * + * util.isString(''); + * // Returns: true + * util.isString('foo'); + * // Returns: true + * util.isString(String('foo')); + * // Returns: true + * util.isString(5); + * // Returns: false + * ``` + * @since v0.11.5 + * @deprecated Since v4.0.0 - Use `typeof value === 'string'` instead. + */ + export function isString(object: unknown): object is string; + /** + * Returns `true` if the given `object` is a `Symbol`. Otherwise, returns `false`. + * + * ```js + * const util = require('node:util'); + * + * util.isSymbol(5); + * // Returns: false + * util.isSymbol('foo'); + * // Returns: false + * util.isSymbol(Symbol('foo')); + * // Returns: true + * ``` + * @since v0.11.5 + * @deprecated Since v4.0.0 - Use `typeof value === 'symbol'` instead. + */ + export function isSymbol(object: unknown): object is symbol; + /** + * Returns `true` if the given `object` is `undefined`. Otherwise, returns `false`. + * + * ```js + * const util = require('node:util'); + * + * const foo = undefined; + * util.isUndefined(5); + * // Returns: false + * util.isUndefined(foo); + * // Returns: true + * util.isUndefined(null); + * // Returns: false + * ``` + * @since v0.11.5 + * @deprecated Since v4.0.0 - Use `value === undefined` instead. + */ + export function isUndefined(object: unknown): object is undefined; + /** + * The `util.deprecate()` method wraps `fn` (which may be a function or class) in + * such a way that it is marked as deprecated. + * + * ```js + * const util = require('node:util'); + * + * exports.obsoleteFunction = util.deprecate(() => { + * // Do something here. + * }, 'obsoleteFunction() is deprecated. Use newShinyFunction() instead.'); + * ``` + * + * When called, `util.deprecate()` will return a function that will emit a`DeprecationWarning` using the `'warning'` event. The warning will + * be emitted and printed to `stderr` the first time the returned function is + * called. After the warning is emitted, the wrapped function is called without + * emitting a warning. + * + * If the same optional `code` is supplied in multiple calls to `util.deprecate()`, + * the warning will be emitted only once for that `code`. + * + * ```js + * const util = require('node:util'); + * + * const fn1 = util.deprecate(someFunction, someMessage, 'DEP0001'); + * const fn2 = util.deprecate(someOtherFunction, someOtherMessage, 'DEP0001'); + * fn1(); // Emits a deprecation warning with code DEP0001 + * fn2(); // Does not emit a deprecation warning because it has the same code + * ``` + * + * If either the `--no-deprecation` or `--no-warnings` command-line flags are + * used, or if the `process.noDeprecation` property is set to `true`_prior_ to + * the first deprecation warning, the `util.deprecate()` method does nothing. + * + * If the `--trace-deprecation` or `--trace-warnings` command-line flags are set, + * or the `process.traceDeprecation` property is set to `true`, a warning and a + * stack trace are printed to `stderr` the first time the deprecated function is + * called. + * + * If the `--throw-deprecation` command-line flag is set, or the`process.throwDeprecation` property is set to `true`, then an exception will be + * thrown when the deprecated function is called. + * + * The `--throw-deprecation` command-line flag and `process.throwDeprecation`property take precedence over `--trace-deprecation` and`process.traceDeprecation`. + * @since v0.8.0 + * @param fn The function that is being deprecated. + * @param msg A warning message to display when the deprecated function is invoked. + * @param code A deprecation code. See the `list of deprecated APIs` for a list of codes. + * @return The deprecated function wrapped to emit a warning. + */ + export function deprecate unknown>( + fn: T, + msg: string, + code?: string, + ): T; + /** + * Returns `true` if there is deep strict equality between `val1` and `val2`. + * Otherwise, returns `false`. + * + * See `assert.deepStrictEqual()` for more information about deep strict + * equality. + * @since v9.0.0 + */ + export function isDeepStrictEqual(val1: unknown, val2: unknown): boolean; + /** + * Returns `str` with any ANSI escape codes removed. + * + * ```js + * console.log(util.stripVTControlCharacters('\u001B[4mvalue\u001B[0m')); + * // Prints "value" + * ``` + * @since v16.11.0 + */ + export function stripVTControlCharacters(str: string): string; + /** + * Takes an `async` function (or a function that returns a `Promise`) and returns a + * function following the error-first callback style, i.e. taking + * an `(err, value) => ...` callback as the last argument. In the callback, the + * first argument will be the rejection reason (or `null` if the `Promise`resolved), and the second argument will be the resolved value. + * + * ```js + * const util = require('node:util'); + * + * async function fn() { + * return 'hello world'; + * } + * const callbackFunction = util.callbackify(fn); + * + * callbackFunction((err, ret) => { + * if (err) throw err; + * console.log(ret); + * }); + * ``` + * + * Will print: + * + * ```text + * hello world + * ``` + * + * The callback is executed asynchronously, and will have a limited stack trace. + * If the callback throws, the process will emit an `'uncaughtException'` event, and if not handled will exit. + * + * Since `null` has a special meaning as the first argument to a callback, if a + * wrapped function rejects a `Promise` with a falsy value as a reason, the value + * is wrapped in an `Error` with the original value stored in a field named`reason`. + * + * ```js + * function fn() { + * return Promise.reject(null); + * } + * const callbackFunction = util.callbackify(fn); + * + * callbackFunction((err, ret) => { + * // When the Promise was rejected with `null` it is wrapped with an Error and + * // the original value is stored in `reason`. + * err && Object.hasOwn(err, 'reason') && err.reason === null; // true + * }); + * ``` + * @since v8.2.0 + * @param fn An `async` function + * @return a callback style function + */ + export function callbackify( + fn: () => Promise, + ): (callback: (err: NodeJS.ErrnoException) => void) => void; + export function callbackify( + fn: () => Promise, + ): (callback: (err: NodeJS.ErrnoException, result: TResult) => void) => void; + export function callbackify( + fn: (arg1: T1) => Promise, + ): (arg1: T1, callback: (err: NodeJS.ErrnoException) => void) => void; + export function callbackify( + fn: (arg1: T1) => Promise, + ): ( + arg1: T1, + callback: (err: NodeJS.ErrnoException, result: TResult) => void, + ) => void; + export function callbackify( + fn: (arg1: T1, arg2: T2) => Promise, + ): ( + arg1: T1, + arg2: T2, + callback: (err: NodeJS.ErrnoException) => void, + ) => void; + export function callbackify( + fn: (arg1: T1, arg2: T2) => Promise, + ): ( + arg1: T1, + arg2: T2, + callback: (err: NodeJS.ErrnoException | null, result: TResult) => void, + ) => void; + export function callbackify( + fn: (arg1: T1, arg2: T2, arg3: T3) => Promise, + ): ( + arg1: T1, + arg2: T2, + arg3: T3, + callback: (err: NodeJS.ErrnoException) => void, + ) => void; + export function callbackify( + fn: (arg1: T1, arg2: T2, arg3: T3) => Promise, + ): ( + arg1: T1, + arg2: T2, + arg3: T3, + callback: (err: NodeJS.ErrnoException | null, result: TResult) => void, + ) => void; + export function callbackify( + fn: (arg1: T1, arg2: T2, arg3: T3, arg4: T4) => Promise, + ): ( + arg1: T1, + arg2: T2, + arg3: T3, + arg4: T4, + callback: (err: NodeJS.ErrnoException) => void, + ) => void; + export function callbackify( + fn: (arg1: T1, arg2: T2, arg3: T3, arg4: T4) => Promise, + ): ( + arg1: T1, + arg2: T2, + arg3: T3, + arg4: T4, + callback: (err: NodeJS.ErrnoException | null, result: TResult) => void, + ) => void; + export function callbackify( + fn: (arg1: T1, arg2: T2, arg3: T3, arg4: T4, arg5: T5) => Promise, + ): ( + arg1: T1, + arg2: T2, + arg3: T3, + arg4: T4, + arg5: T5, + callback: (err: NodeJS.ErrnoException) => void, + ) => void; + export function callbackify( + fn: (arg1: T1, arg2: T2, arg3: T3, arg4: T4, arg5: T5) => Promise, + ): ( + arg1: T1, + arg2: T2, + arg3: T3, + arg4: T4, + arg5: T5, + callback: (err: NodeJS.ErrnoException | null, result: TResult) => void, + ) => void; + export function callbackify( + fn: ( + arg1: T1, + arg2: T2, + arg3: T3, + arg4: T4, + arg5: T5, + arg6: T6, + ) => Promise, + ): ( + arg1: T1, + arg2: T2, + arg3: T3, + arg4: T4, + arg5: T5, + arg6: T6, + callback: (err: NodeJS.ErrnoException) => void, + ) => void; + export function callbackify( + fn: ( + arg1: T1, + arg2: T2, + arg3: T3, + arg4: T4, + arg5: T5, + arg6: T6, + ) => Promise, + ): ( + arg1: T1, + arg2: T2, + arg3: T3, + arg4: T4, + arg5: T5, + arg6: T6, + callback: (err: NodeJS.ErrnoException | null, result: TResult) => void, + ) => void; + export interface CustomPromisifyLegacy< + TCustom extends (...args: unknown[]) => unknown, + > { + (...args: unknown[]): unknown; + __promisify__: TCustom; + } + export interface CustomPromisifySymbol< + TCustom extends (...args: unknown[]) => unknown, + > { + (...args: unknown[]): unknown; + [promisify.custom]: TCustom; + } + export type CustomPromisify unknown> = + CustomPromisifySymbol | CustomPromisifyLegacy; + + /** + * Takes a function following the common error-first callback style, i.e. taking + * an `(err, value) => ...` callback as the last argument, and returns a version + * that returns promises. + * + * ```js + * const util = require('node:util'); + * const fs = require('node:fs'); + * + * const stat = util.promisify(fs.stat); + * stat('.').then((stats) => { + * // Do something with `stats` + * }).catch((error) => { + * // Handle the error. + * }); + * ``` + * + * Or, equivalently using `async function`s: + * + * ```js + * const util = require('node:util'); + * const fs = require('node:fs'); + * + * const stat = util.promisify(fs.stat); + * + * async function callStat() { + * const stats = await stat('.'); + * console.log(`This directory is owned by ${stats.uid}`); + * } + * + * callStat(); + * ``` + * + * If there is an `original[util.promisify.custom]` property present, `promisify`will return its value, see `Custom promisified functions`. + * + * `promisify()` assumes that `original` is a function taking a callback as its + * final argument in all cases. If `original` is not a function, `promisify()`will throw an error. If `original` is a function but its last argument is not + * an error-first callback, it will still be passed an error-first + * callback as its last argument. + * + * Using `promisify()` on class methods or other methods that use `this` may not + * work as expected unless handled specially: + * + * ```js + * const util = require('node:util'); + * + * class Foo { + * constructor() { + * this.a = 42; + * } + * + * bar(callback) { + * callback(null, this.a); + * } + * } + * + * const foo = new Foo(); + * + * const naiveBar = util.promisify(foo.bar); + * // TypeError: Cannot read property 'a' of undefined + * // naiveBar().then(a => console.log(a)); + * + * naiveBar.call(foo).then((a) => console.log(a)); // '42' + * + * const bindBar = naiveBar.bind(foo); + * bindBar().then((a) => console.log(a)); // '42' + * ``` + * @since v8.0.0 + */ + export function promisify unknown>( + fn: CustomPromisify, + ): TCustom; + export function promisify( + fn: (callback: (err: unknown, result: TResult) => void) => void, + ): () => Promise; + export function promisify( + fn: (callback: (err?: unknown) => void) => void, + ): () => Promise; + export function promisify( + fn: (arg1: T1, callback: (err: unknown, result: TResult) => void) => void, + ): (arg1: T1) => Promise; + export function promisify( + fn: (arg1: T1, callback: (err?: unknown) => void) => void, + ): (arg1: T1) => Promise; + export function promisify( + fn: ( + arg1: T1, + arg2: T2, + callback: (err: unknown, result: TResult) => void, + ) => void, + ): (arg1: T1, arg2: T2) => Promise; + export function promisify( + fn: (arg1: T1, arg2: T2, callback: (err?: unknown) => void) => void, + ): (arg1: T1, arg2: T2) => Promise; + export function promisify( + fn: ( + arg1: T1, + arg2: T2, + arg3: T3, + callback: (err: unknown, result: TResult) => void, + ) => void, + ): (arg1: T1, arg2: T2, arg3: T3) => Promise; + export function promisify( + fn: ( + arg1: T1, + arg2: T2, + arg3: T3, + callback: (err?: unknown) => void, + ) => void, + ): (arg1: T1, arg2: T2, arg3: T3) => Promise; + export function promisify( + fn: ( + arg1: T1, + arg2: T2, + arg3: T3, + arg4: T4, + callback: (err: unknown, result: TResult) => void, + ) => void, + ): (arg1: T1, arg2: T2, arg3: T3, arg4: T4) => Promise; + export function promisify( + fn: ( + arg1: T1, + arg2: T2, + arg3: T3, + arg4: T4, + callback: (err?: unknown) => void, + ) => void, + ): (arg1: T1, arg2: T2, arg3: T3, arg4: T4) => Promise; + export function promisify( + fn: ( + arg1: T1, + arg2: T2, + arg3: T3, + arg4: T4, + arg5: T5, + callback: (err: unknown, result: TResult) => void, + ) => void, + ): (arg1: T1, arg2: T2, arg3: T3, arg4: T4, arg5: T5) => Promise; + export function promisify( + fn: ( + arg1: T1, + arg2: T2, + arg3: T3, + arg4: T4, + arg5: T5, + callback: (err?: unknown) => void, + ) => void, + ): (arg1: T1, arg2: T2, arg3: T3, arg4: T4, arg5: T5) => Promise; + export function promisify void>( + fn: T, + ): (...funcArgs: Parameters) => Promise; + export namespace promisify { + /** + * That can be used to declare custom promisified variants of functions. + */ + const custom: unique symbol; + } + /** + * An implementation of the [WHATWG Encoding Standard](https://encoding.spec.whatwg.org/) `TextDecoder` API. + * + * ```js + * const decoder = new TextDecoder(); + * const u8arr = new Uint8Array([72, 101, 108, 108, 111]); + * console.log(decoder.decode(u8arr)); // Hello + * ``` + * @since v8.3.0 + */ + export class TextDecoder { + /** + * The encoding supported by the `TextDecoder` instance. + */ + readonly encoding: string; + /** + * The value will be `true` if decoding errors result in a `TypeError` being + * thrown. + */ + readonly fatal: boolean; + /** + * The value will be `true` if the decoding result will include the byte order + * mark. + */ + readonly ignoreBOM: boolean; + constructor( + encoding?: string, + options?: { + fatal?: boolean | undefined; + ignoreBOM?: boolean | undefined; + }, + ); + /** + * Decodes the `input` and returns a string. If `options.stream` is `true`, any + * incomplete byte sequences occurring at the end of the `input` are buffered + * internally and emitted after the next call to `textDecoder.decode()`. + * + * If `textDecoder.fatal` is `true`, decoding errors that occur will result in a`TypeError` being thrown. + * @param input An `ArrayBuffer`, `DataView`, or `TypedArray` instance containing the encoded data. + */ + decode( + input?: NodeJS.ArrayBufferView | ArrayBuffer | null, + options?: { + stream?: boolean | undefined; + }, + ): string; + } + export interface EncodeIntoResult { + /** + * The read Unicode code units of input. + */ + read: number; + /** + * The written UTF-8 bytes of output. + */ + written: number; + } + export { types }; + + //// TextEncoder/Decoder + /** + * An implementation of the [WHATWG Encoding Standard](https://encoding.spec.whatwg.org/) `TextEncoder` API. All + * instances of `TextEncoder` only support UTF-8 encoding. + * + * ```js + * const encoder = new TextEncoder(); + * const uint8array = encoder.encode('this is some data'); + * ``` + * + * The `TextEncoder` class is also available on the global object. + * @since v8.3.0 + */ + export class TextEncoder { /** - * Takes a function following the common error-first callback style, i.e. taking - * an `(err, value) => ...` callback as the last argument, and returns a version - * that returns promises. - * - * ```js - * const util = require('node:util'); - * const fs = require('node:fs'); - * - * const stat = util.promisify(fs.stat); - * stat('.').then((stats) => { - * // Do something with `stats` - * }).catch((error) => { - * // Handle the error. - * }); - * ``` - * - * Or, equivalently using `async function`s: - * - * ```js - * const util = require('node:util'); - * const fs = require('node:fs'); - * - * const stat = util.promisify(fs.stat); - * - * async function callStat() { - * const stats = await stat('.'); - * console.log(`This directory is owned by ${stats.uid}`); - * } - * - * callStat(); - * ``` - * - * If there is an `original[util.promisify.custom]` property present, `promisify`will return its value, see `Custom promisified functions`. - * - * `promisify()` assumes that `original` is a function taking a callback as its - * final argument in all cases. If `original` is not a function, `promisify()`will throw an error. If `original` is a function but its last argument is not - * an error-first callback, it will still be passed an error-first - * callback as its last argument. - * - * Using `promisify()` on class methods or other methods that use `this` may not - * work as expected unless handled specially: - * - * ```js - * const util = require('node:util'); - * - * class Foo { - * constructor() { - * this.a = 42; - * } - * - * bar(callback) { - * callback(null, this.a); - * } - * } - * - * const foo = new Foo(); - * - * const naiveBar = util.promisify(foo.bar); - * // TypeError: Cannot read property 'a' of undefined - * // naiveBar().then(a => console.log(a)); - * - * naiveBar.call(foo).then((a) => console.log(a)); // '42' - * - * const bindBar = naiveBar.bind(foo); - * bindBar().then((a) => console.log(a)); // '42' - * ``` - * @since v8.0.0 + * The encoding supported by the `TextEncoder` instance. Always set to `'utf-8'`. */ - export function promisify(fn: CustomPromisify): TCustom; - export function promisify( - fn: (callback: (err: any, result: TResult) => void) => void, - ): () => Promise; - export function promisify(fn: (callback: (err?: any) => void) => void): () => Promise; - export function promisify( - fn: (arg1: T1, callback: (err: any, result: TResult) => void) => void, - ): (arg1: T1) => Promise; - export function promisify(fn: (arg1: T1, callback: (err?: any) => void) => void): (arg1: T1) => Promise; - export function promisify( - fn: (arg1: T1, arg2: T2, callback: (err: any, result: TResult) => void) => void, - ): (arg1: T1, arg2: T2) => Promise; - export function promisify( - fn: (arg1: T1, arg2: T2, callback: (err?: any) => void) => void, - ): (arg1: T1, arg2: T2) => Promise; - export function promisify( - fn: (arg1: T1, arg2: T2, arg3: T3, callback: (err: any, result: TResult) => void) => void, - ): (arg1: T1, arg2: T2, arg3: T3) => Promise; - export function promisify( - fn: (arg1: T1, arg2: T2, arg3: T3, callback: (err?: any) => void) => void, - ): (arg1: T1, arg2: T2, arg3: T3) => Promise; - export function promisify( - fn: (arg1: T1, arg2: T2, arg3: T3, arg4: T4, callback: (err: any, result: TResult) => void) => void, - ): (arg1: T1, arg2: T2, arg3: T3, arg4: T4) => Promise; - export function promisify( - fn: (arg1: T1, arg2: T2, arg3: T3, arg4: T4, callback: (err?: any) => void) => void, - ): (arg1: T1, arg2: T2, arg3: T3, arg4: T4) => Promise; - export function promisify( - fn: (arg1: T1, arg2: T2, arg3: T3, arg4: T4, arg5: T5, callback: (err: any, result: TResult) => void) => void, - ): (arg1: T1, arg2: T2, arg3: T3, arg4: T4, arg5: T5) => Promise; - export function promisify( - fn: (arg1: T1, arg2: T2, arg3: T3, arg4: T4, arg5: T5, callback: (err?: any) => void) => void, - ): (arg1: T1, arg2: T2, arg3: T3, arg4: T4, arg5: T5) => Promise; - export function promisify(fn: Function): Function; - export namespace promisify { - /** - * That can be used to declare custom promisified variants of functions. - */ - const custom: unique symbol; - } + readonly encoding: string; /** - * An implementation of the [WHATWG Encoding Standard](https://encoding.spec.whatwg.org/) `TextDecoder` API. - * - * ```js - * const decoder = new TextDecoder(); - * const u8arr = new Uint8Array([72, 101, 108, 108, 111]); - * console.log(decoder.decode(u8arr)); // Hello - * ``` - * @since v8.3.0 + * UTF-8 encodes the `input` string and returns a `Uint8Array` containing the + * encoded bytes. + * @param [input='an empty string'] The text to encode. */ - export class TextDecoder { - /** - * The encoding supported by the `TextDecoder` instance. - */ - readonly encoding: string; - /** - * The value will be `true` if decoding errors result in a `TypeError` being - * thrown. - */ - readonly fatal: boolean; - /** - * The value will be `true` if the decoding result will include the byte order - * mark. - */ - readonly ignoreBOM: boolean; - constructor( - encoding?: string, - options?: { - fatal?: boolean | undefined; - ignoreBOM?: boolean | undefined; - }, - ); - /** - * Decodes the `input` and returns a string. If `options.stream` is `true`, any - * incomplete byte sequences occurring at the end of the `input` are buffered - * internally and emitted after the next call to `textDecoder.decode()`. - * - * If `textDecoder.fatal` is `true`, decoding errors that occur will result in a`TypeError` being thrown. - * @param input An `ArrayBuffer`, `DataView`, or `TypedArray` instance containing the encoded data. - */ - decode( - input?: NodeJS.ArrayBufferView | ArrayBuffer | null, - options?: { - stream?: boolean | undefined; - }, - ): string; - } - export interface EncodeIntoResult { - /** - * The read Unicode code units of input. - */ - read: number; - /** - * The written UTF-8 bytes of output. - */ - written: number; - } - export { types }; - - //// TextEncoder/Decoder + encode(input?: string): Uint8Array; /** - * An implementation of the [WHATWG Encoding Standard](https://encoding.spec.whatwg.org/) `TextEncoder` API. All - * instances of `TextEncoder` only support UTF-8 encoding. + * UTF-8 encodes the `src` string to the `dest` Uint8Array and returns an object + * containing the read Unicode code units and written UTF-8 bytes. * * ```js * const encoder = new TextEncoder(); - * const uint8array = encoder.encode('this is some data'); - * ``` - * - * The `TextEncoder` class is also available on the global object. - * @since v8.3.0 - */ - export class TextEncoder { - /** - * The encoding supported by the `TextEncoder` instance. Always set to `'utf-8'`. - */ - readonly encoding: string; - /** - * UTF-8 encodes the `input` string and returns a `Uint8Array` containing the - * encoded bytes. - * @param [input='an empty string'] The text to encode. - */ - encode(input?: string): Uint8Array; - /** - * UTF-8 encodes the `src` string to the `dest` Uint8Array and returns an object - * containing the read Unicode code units and written UTF-8 bytes. - * - * ```js - * const encoder = new TextEncoder(); - * const src = 'this is some data'; - * const dest = new Uint8Array(10); - * const { read, written } = encoder.encodeInto(src, dest); - * ``` - * @param src The text to encode. - * @param dest The array to hold the encode result. - */ - encodeInto(src: string, dest: Uint8Array): EncodeIntoResult; + * const src = 'this is some data'; + * const dest = new Uint8Array(10); + * const { read, written } = encoder.encodeInto(src, dest); + * ``` + * @param src The text to encode. + * @param dest The array to hold the encode result. + */ + encodeInto(src: string, dest: Uint8Array): EncodeIntoResult; + } + import { + TextDecoder as _TextDecoder, + TextEncoder as _TextEncoder, + } from "util"; + global { + /** + * `TextDecoder` class is a global reference for `require('util').TextDecoder` + * https://nodejs.org/api/globals.html#textdecoder + * @since v11.0.0 + */ + let TextDecoder: typeof globalThis extends { + onmessage: unknown; + TextDecoder: infer TextDecoder; } - import { TextDecoder as _TextDecoder, TextEncoder as _TextEncoder } from "util"; - global { - /** - * `TextDecoder` class is a global reference for `require('util').TextDecoder` - * https://nodejs.org/api/globals.html#textdecoder - * @since v11.0.0 - */ - var TextDecoder: typeof globalThis extends { - onmessage: any; - TextDecoder: infer TextDecoder; - } ? TextDecoder - : typeof _TextDecoder; - /** - * `TextEncoder` class is a global reference for `require('util').TextEncoder` - * https://nodejs.org/api/globals.html#textencoder - * @since v11.0.0 - */ - var TextEncoder: typeof globalThis extends { - onmessage: any; - TextEncoder: infer TextEncoder; - } ? TextEncoder - : typeof _TextEncoder; + ? TextDecoder + : typeof _TextDecoder; + /** + * `TextEncoder` class is a global reference for `require('util').TextEncoder` + * https://nodejs.org/api/globals.html#textencoder + * @since v11.0.0 + */ + let TextEncoder: typeof globalThis extends { + onmessage: unknown; + TextEncoder: infer TextEncoder; } + ? TextEncoder + : typeof _TextEncoder; + } - //// parseArgs + //// parseArgs + /** + * Provides a higher level API for command-line argument parsing than interacting + * with `process.argv` directly. Takes a specification for the expected arguments + * and returns a structured object with the parsed options and positionals. + * + * ```js + * import { parseArgs } from 'node:util'; + * const args = ['-f', '--bar', 'b']; + * const options = { + * foo: { + * type: 'boolean', + * short: 'f', + * }, + * bar: { + * type: 'string', + * }, + * }; + * const { + * values, + * positionals, + * } = parseArgs({ args, options }); + * console.log(values, positionals); + * // Prints: [Object: null prototype] { foo: true, bar: 'b' } [] + * ``` + * @since v18.3.0, v16.17.0 + * @param config Used to provide arguments for parsing and to configure the parser. `config` supports the following properties: + * @return The parsed command line arguments: + */ + export function parseArgs( + config?: T, + ): ParsedResults; + interface ParseArgsOptionConfig { + /** + * Type of argument. + */ + type: "string" | "boolean"; + /** + * Whether this option can be provided multiple times. + * If `true`, all values will be collected in an array. + * If `false`, values for the option are last-wins. + * @default false. + */ + multiple?: boolean | undefined; + /** + * A single character alias for the option. + */ + short?: string | undefined; + /** + * The default option value when it is not set by args. + * It must be of the same type as the the `type` property. + * When `multiple` is `true`, it must be an array. + * @since v18.11.0 + */ + default?: string | boolean | string[] | boolean[] | undefined; + } + interface ParseArgsOptionsConfig { + [longOption: string]: ParseArgsOptionConfig; + } + export interface ParseArgsConfig { /** - * Provides a higher level API for command-line argument parsing than interacting - * with `process.argv` directly. Takes a specification for the expected arguments - * and returns a structured object with the parsed options and positionals. - * - * ```js - * import { parseArgs } from 'node:util'; - * const args = ['-f', '--bar', 'b']; - * const options = { - * foo: { - * type: 'boolean', - * short: 'f', - * }, - * bar: { - * type: 'string', - * }, - * }; - * const { - * values, - * positionals, - * } = parseArgs({ args, options }); - * console.log(values, positionals); - * // Prints: [Object: null prototype] { foo: true, bar: 'b' } [] - * ``` - * @since v18.3.0, v16.17.0 - * @param config Used to provide arguments for parsing and to configure the parser. `config` supports the following properties: - * @return The parsed command line arguments: + * Array of argument strings. */ - export function parseArgs(config?: T): ParsedResults; - interface ParseArgsOptionConfig { - /** - * Type of argument. - */ - type: "string" | "boolean"; - /** - * Whether this option can be provided multiple times. - * If `true`, all values will be collected in an array. - * If `false`, values for the option are last-wins. - * @default false. - */ - multiple?: boolean | undefined; - /** - * A single character alias for the option. - */ - short?: string | undefined; - /** - * The default option value when it is not set by args. - * It must be of the same type as the the `type` property. - * When `multiple` is `true`, it must be an array. - * @since v18.11.0 - */ - default?: string | boolean | string[] | boolean[] | undefined; - } - interface ParseArgsOptionsConfig { - [longOption: string]: ParseArgsOptionConfig; - } - export interface ParseArgsConfig { - /** - * Array of argument strings. - */ - args?: string[] | undefined; - /** - * Used to describe arguments known to the parser. - */ - options?: ParseArgsOptionsConfig | undefined; - /** - * Should an error be thrown when unknown arguments are encountered, - * or when arguments are passed that do not match the `type` configured in `options`. - * @default true - */ - strict?: boolean | undefined; - /** - * Whether this command accepts positional arguments. - */ - allowPositionals?: boolean | undefined; - /** - * Return the parsed tokens. This is useful for extending the built-in behavior, - * from adding additional checks through to reprocessing the tokens in different ways. - * @default false - */ - tokens?: boolean | undefined; - } - /* + args?: string[] | undefined; + /** + * Used to describe arguments known to the parser. + */ + options?: ParseArgsOptionsConfig | undefined; + /** + * Should an error be thrown when unknown arguments are encountered, + * or when arguments are passed that do not match the `type` configured in `options`. + * @default true + */ + strict?: boolean | undefined; + /** + * Whether this command accepts positional arguments. + */ + allowPositionals?: boolean | undefined; + /** + * Return the parsed tokens. This is useful for extending the built-in behavior, + * from adding additional checks through to reprocessing the tokens in different ways. + * @default false + */ + tokens?: boolean | undefined; + } + /* IfDefaultsTrue and IfDefaultsFalse are helpers to handle default values for missing boolean properties. TypeScript does not have exact types for objects: https://github.com/microsoft/TypeScript/issues/12936 This means it is impossible to distinguish between "field X is definitely not present" and "field X may or may not be present". @@ -1388,797 +1529,850 @@ declare module "util" { This is technically incorrect but is a much nicer UX for the common case. The IfDefaultsTrue version is for things which default to true; the IfDefaultsFalse version is for things which default to false. */ - type IfDefaultsTrue = T extends true ? IfTrue - : T extends false ? IfFalse - : IfTrue; + type IfDefaultsTrue = T extends true + ? IfTrue + : T extends false + ? IfFalse + : IfTrue; - // we put the `extends false` condition first here because `undefined` compares like `any` when `strictNullChecks: false` - type IfDefaultsFalse = T extends false ? IfFalse - : T extends true ? IfTrue - : IfFalse; + // we put the `extends false` condition first here because `undefined` compares like `any` when `strictNullChecks: false` + type IfDefaultsFalse = T extends false + ? IfFalse + : T extends true + ? IfTrue + : IfFalse; - type ExtractOptionValue = IfDefaultsTrue< - T["strict"], - O["type"] extends "string" ? string : O["type"] extends "boolean" ? boolean : string | boolean, - string | boolean - >; + type ExtractOptionValue< + T extends ParseArgsConfig, + O extends ParseArgsOptionConfig, + > = IfDefaultsTrue< + T["strict"], + O["type"] extends "string" + ? string + : O["type"] extends "boolean" + ? boolean + : string | boolean, + string | boolean + >; - type ParsedValues = - & IfDefaultsTrue - & (T["options"] extends ParseArgsOptionsConfig ? { - -readonly [LongOption in keyof T["options"]]: IfDefaultsFalse< - T["options"][LongOption]["multiple"], - undefined | Array>, - undefined | ExtractOptionValue - >; - } - : {}); + type ParsedValues = IfDefaultsTrue< + T["strict"], + unknown, + { [longOption: string]: undefined | string | boolean } + > & + (T["options"] extends ParseArgsOptionsConfig + ? { + -readonly [LongOption in keyof T["options"]]: IfDefaultsFalse< + T["options"][LongOption]["multiple"], + undefined | Array>, + undefined | ExtractOptionValue + >; + } + : object); - type ParsedPositionals = IfDefaultsTrue< - T["strict"], - IfDefaultsFalse, - IfDefaultsTrue - >; + type ParsedPositionals = IfDefaultsTrue< + T["strict"], + IfDefaultsFalse, + IfDefaultsTrue + >; - type PreciseTokenForOptions< - K extends string, - O extends ParseArgsOptionConfig, - > = O["type"] extends "string" ? { - kind: "option"; - index: number; - name: K; - rawName: string; - value: string; - inlineValue: boolean; + type PreciseTokenForOptions< + K extends string, + O extends ParseArgsOptionConfig, + > = O["type"] extends "string" + ? { + kind: "option"; + index: number; + name: K; + rawName: string; + value: string; + inlineValue: boolean; + } + : O["type"] extends "boolean" + ? { + kind: "option"; + index: number; + name: K; + rawName: string; + value: undefined; + inlineValue: undefined; } - : O["type"] extends "boolean" ? { - kind: "option"; - index: number; - name: K; - rawName: string; - value: undefined; - inlineValue: undefined; - } - : OptionToken & { name: K }; + : OptionToken & { name: K }; - type TokenForOptions< - T extends ParseArgsConfig, - K extends keyof T["options"] = keyof T["options"], - > = K extends unknown - ? T["options"] extends ParseArgsOptionsConfig ? PreciseTokenForOptions - : OptionToken - : never; + type TokenForOptions< + T extends ParseArgsConfig, + K extends keyof T["options"] = keyof T["options"], + > = K extends unknown + ? T["options"] extends ParseArgsOptionsConfig + ? PreciseTokenForOptions + : OptionToken + : never; - type ParsedOptionToken = IfDefaultsTrue, OptionToken>; + type ParsedOptionToken = IfDefaultsTrue< + T["strict"], + TokenForOptions, + OptionToken + >; - type ParsedPositionalToken = IfDefaultsTrue< - T["strict"], - IfDefaultsFalse, - IfDefaultsTrue - >; + type ParsedPositionalToken = IfDefaultsTrue< + T["strict"], + IfDefaultsFalse< + T["allowPositionals"], + { kind: "positional"; index: number; value: string }, + never + >, + IfDefaultsTrue< + T["allowPositionals"], + { kind: "positional"; index: number; value: string }, + never + > + >; - type ParsedTokens = Array< - ParsedOptionToken | ParsedPositionalToken | { kind: "option-terminator"; index: number } - >; + type ParsedTokens = Array< + | ParsedOptionToken + | ParsedPositionalToken + | { kind: "option-terminator"; index: number } + >; - type PreciseParsedResults = IfDefaultsFalse< - T["tokens"], - { - values: ParsedValues; - positionals: ParsedPositionals; - tokens: ParsedTokens; - }, - { - values: ParsedValues; - positionals: ParsedPositionals; - } - >; + type PreciseParsedResults = IfDefaultsFalse< + T["tokens"], + { + values: ParsedValues; + positionals: ParsedPositionals; + tokens: ParsedTokens; + }, + { + values: ParsedValues; + positionals: ParsedPositionals; + } + >; - type OptionToken = - | { kind: "option"; index: number; name: string; rawName: string; value: string; inlineValue: boolean } - | { - kind: "option"; - index: number; - name: string; - rawName: string; - value: undefined; - inlineValue: undefined; - }; + type OptionToken = + | { + kind: "option"; + index: number; + name: string; + rawName: string; + value: string; + inlineValue: boolean; + } + | { + kind: "option"; + index: number; + name: string; + rawName: string; + value: undefined; + inlineValue: undefined; + }; - type Token = - | OptionToken - | { kind: "positional"; index: number; value: string } - | { kind: "option-terminator"; index: number }; + type Token = + | OptionToken + | { kind: "positional"; index: number; value: string } + | { kind: "option-terminator"; index: number }; - // If ParseArgsConfig extends T, then the user passed config constructed elsewhere. - // So we can't rely on the `"not definitely present" implies "definitely not present"` assumption mentioned above. - type ParsedResults = ParseArgsConfig extends T ? { - values: { - [longOption: string]: undefined | string | boolean | Array; - }; - positionals: string[]; - tokens?: Token[]; - } - : PreciseParsedResults; + // If ParseArgsConfig extends T, then the user passed config constructed elsewhere. + // So we can't rely on the `"not definitely present" implies "definitely not present"` assumption mentioned above. + type ParsedResults = ParseArgsConfig extends T + ? { + values: { + [longOption: string]: + | undefined + | string + | boolean + | Array; + }; + positionals: string[]; + tokens?: Token[]; + } + : PreciseParsedResults; - /** - * An implementation of [the MIMEType class](https://bmeck.github.io/node-proposal-mime-api/). - * - * In accordance with browser conventions, all properties of `MIMEType` objects - * are implemented as getters and setters on the class prototype, rather than as - * data properties on the object itself. - * - * A MIME string is a structured string containing multiple meaningful - * components. When parsed, a `MIMEType` object is returned containing - * properties for each of these components. - * @since v19.1.0, v18.13.0 - * @experimental - */ - export class MIMEType { - /** - * Creates a new MIMEType object by parsing the input. - * - * A `TypeError` will be thrown if the `input` is not a valid MIME. - * Note that an effort will be made to coerce the given values into strings. - * @param input The input MIME to parse. - */ - constructor(input: string | { toString: () => string }); + /** + * An implementation of [the MIMEType class](https://bmeck.github.io/node-proposal-mime-api/). + * + * In accordance with browser conventions, all properties of `MIMEType` objects + * are implemented as getters and setters on the class prototype, rather than as + * data properties on the object itself. + * + * A MIME string is a structured string containing multiple meaningful + * components. When parsed, a `MIMEType` object is returned containing + * properties for each of these components. + * @since v19.1.0, v18.13.0 + * @experimental + */ + export class MIMEType { + /** + * Creates a new MIMEType object by parsing the input. + * + * A `TypeError` will be thrown if the `input` is not a valid MIME. + * Note that an effort will be made to coerce the given values into strings. + * @param input The input MIME to parse. + */ + constructor(input: string | { toString: () => string }); - /** - * Gets and sets the type portion of the MIME. - * - * ```js - * import { MIMEType } from 'node:util'; - * - * const myMIME = new MIMEType('text/javascript'); - * console.log(myMIME.type); - * // Prints: text - * myMIME.type = 'application'; - * console.log(myMIME.type); - * // Prints: application - * console.log(String(myMIME)); - * // Prints: application/javascript - * ``` - */ - type: string; - /** - * Gets and sets the subtype portion of the MIME. - * - * ```js - * import { MIMEType } from 'node:util'; - * - * const myMIME = new MIMEType('text/ecmascript'); - * console.log(myMIME.subtype); - * // Prints: ecmascript - * myMIME.subtype = 'javascript'; - * console.log(myMIME.subtype); - * // Prints: javascript - * console.log(String(myMIME)); - * // Prints: text/javascript - * ``` - */ - subtype: string; - /** - * Gets the essence of the MIME. This property is read only. - * Use `mime.type` or `mime.subtype` to alter the MIME. - * - * ```js - * import { MIMEType } from 'node:util'; - * - * const myMIME = new MIMEType('text/javascript;key=value'); - * console.log(myMIME.essence); - * // Prints: text/javascript - * myMIME.type = 'application'; - * console.log(myMIME.essence); - * // Prints: application/javascript - * console.log(String(myMIME)); - * // Prints: application/javascript;key=value - * ``` - */ - readonly essence: string; - /** - * Gets the `MIMEParams` object representing the - * parameters of the MIME. This property is read-only. See `MIMEParams` documentation for details. - */ - readonly params: MIMEParams; - /** - * The `toString()` method on the `MIMEType` object returns the serialized MIME. - * - * Because of the need for standard compliance, this method does not allow users - * to customize the serialization process of the MIME. - */ - toString(): string; - } - /** - * The `MIMEParams` API provides read and write access to the parameters of a`MIMEType`. - * @since v19.1.0, v18.13.0 - */ - export class MIMEParams { - /** - * Remove all name-value pairs whose name is `name`. - */ - delete(name: string): void; - /** - * Returns an iterator over each of the name-value pairs in the parameters. - * Each item of the iterator is a JavaScript `Array`. The first item of the array - * is the `name`, the second item of the array is the `value`. - */ - entries(): IterableIterator<[name: string, value: string]>; - /** - * Returns the value of the first name-value pair whose name is `name`. If there - * are no such pairs, `null` is returned. - * @return or `null` if there is no name-value pair with the given `name`. - */ - get(name: string): string | null; - /** - * Returns `true` if there is at least one name-value pair whose name is `name`. - */ - has(name: string): boolean; - /** - * Returns an iterator over the names of each name-value pair. - * - * ```js - * import { MIMEType } from 'node:util'; - * - * const { params } = new MIMEType('text/plain;foo=0;bar=1'); - * for (const name of params.keys()) { - * console.log(name); - * } - * // Prints: - * // foo - * // bar - * ``` - */ - keys(): IterableIterator; - /** - * Sets the value in the `MIMEParams` object associated with `name` to`value`. If there are any pre-existing name-value pairs whose names are `name`, - * set the first such pair's value to `value`. - * - * ```js - * import { MIMEType } from 'node:util'; - * - * const { params } = new MIMEType('text/plain;foo=0;bar=1'); - * params.set('foo', 'def'); - * params.set('baz', 'xyz'); - * console.log(params.toString()); - * // Prints: foo=def;bar=1;baz=xyz - * ``` - */ - set(name: string, value: string): void; - /** - * Returns an iterator over the values of each name-value pair. - */ - values(): IterableIterator; - /** - * Returns an iterator over each of the name-value pairs in the parameters. - */ - [Symbol.iterator]: typeof MIMEParams.prototype.entries; - } -} -declare module "util/types" { - import { KeyObject, webcrypto } from "node:crypto"; - /** - * Returns `true` if the value is a built-in [`ArrayBuffer`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer) or - * [`SharedArrayBuffer`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer) instance. - * - * See also `util.types.isArrayBuffer()` and `util.types.isSharedArrayBuffer()`. - * - * ```js - * util.types.isAnyArrayBuffer(new ArrayBuffer()); // Returns true - * util.types.isAnyArrayBuffer(new SharedArrayBuffer()); // Returns true - * ``` - * @since v10.0.0 - */ - function isAnyArrayBuffer(object: unknown): object is ArrayBufferLike; - /** - * Returns `true` if the value is an `arguments` object. - * - * ```js - * function foo() { - * util.types.isArgumentsObject(arguments); // Returns true - * } - * ``` - * @since v10.0.0 - */ - function isArgumentsObject(object: unknown): object is IArguments; - /** - * Returns `true` if the value is a built-in [`ArrayBuffer`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer) instance. - * This does _not_ include [`SharedArrayBuffer`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer) instances. Usually, it is - * desirable to test for both; See `util.types.isAnyArrayBuffer()` for that. - * - * ```js - * util.types.isArrayBuffer(new ArrayBuffer()); // Returns true - * util.types.isArrayBuffer(new SharedArrayBuffer()); // Returns false - * ``` - * @since v10.0.0 - */ - function isArrayBuffer(object: unknown): object is ArrayBuffer; - /** - * Returns `true` if the value is an instance of one of the [`ArrayBuffer`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer) views, such as typed - * array objects or [`DataView`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/DataView). Equivalent to - * [`ArrayBuffer.isView()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer/isView). - * - * ```js - * util.types.isArrayBufferView(new Int8Array()); // true - * util.types.isArrayBufferView(Buffer.from('hello world')); // true - * util.types.isArrayBufferView(new DataView(new ArrayBuffer(16))); // true - * util.types.isArrayBufferView(new ArrayBuffer()); // false - * ``` - * @since v10.0.0 - */ - function isArrayBufferView(object: unknown): object is NodeJS.ArrayBufferView; - /** - * Returns `true` if the value is an [async function](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/async_function). - * This only reports back what the JavaScript engine is seeing; - * in particular, the return value may not match the original source code if - * a transpilation tool was used. - * - * ```js - * util.types.isAsyncFunction(function foo() {}); // Returns false - * util.types.isAsyncFunction(async function foo() {}); // Returns true - * ``` - * @since v10.0.0 - */ - function isAsyncFunction(object: unknown): boolean; - /** - * Returns `true` if the value is a `BigInt64Array` instance. - * - * ```js - * util.types.isBigInt64Array(new BigInt64Array()); // Returns true - * util.types.isBigInt64Array(new BigUint64Array()); // Returns false - * ``` - * @since v10.0.0 - */ - function isBigInt64Array(value: unknown): value is BigInt64Array; - /** - * Returns `true` if the value is a `BigUint64Array` instance. - * - * ```js - * util.types.isBigUint64Array(new BigInt64Array()); // Returns false - * util.types.isBigUint64Array(new BigUint64Array()); // Returns true - * ``` - * @since v10.0.0 - */ - function isBigUint64Array(value: unknown): value is BigUint64Array; - /** - * Returns `true` if the value is a boolean object, e.g. created - * by `new Boolean()`. - * - * ```js - * util.types.isBooleanObject(false); // Returns false - * util.types.isBooleanObject(true); // Returns false - * util.types.isBooleanObject(new Boolean(false)); // Returns true - * util.types.isBooleanObject(new Boolean(true)); // Returns true - * util.types.isBooleanObject(Boolean(false)); // Returns false - * util.types.isBooleanObject(Boolean(true)); // Returns false - * ``` - * @since v10.0.0 - */ - function isBooleanObject(object: unknown): object is Boolean; - /** - * Returns `true` if the value is any boxed primitive object, e.g. created - * by `new Boolean()`, `new String()` or `Object(Symbol())`. - * - * For example: - * - * ```js - * util.types.isBoxedPrimitive(false); // Returns false - * util.types.isBoxedPrimitive(new Boolean(false)); // Returns true - * util.types.isBoxedPrimitive(Symbol('foo')); // Returns false - * util.types.isBoxedPrimitive(Object(Symbol('foo'))); // Returns true - * util.types.isBoxedPrimitive(Object(BigInt(5))); // Returns true - * ``` - * @since v10.11.0 - */ - function isBoxedPrimitive(object: unknown): object is String | Number | BigInt | Boolean | Symbol; - /** - * Returns `true` if the value is a built-in [`DataView`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/DataView) instance. - * - * ```js - * const ab = new ArrayBuffer(20); - * util.types.isDataView(new DataView(ab)); // Returns true - * util.types.isDataView(new Float64Array()); // Returns false - * ``` - * - * See also [`ArrayBuffer.isView()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer/isView). - * @since v10.0.0 - */ - function isDataView(object: unknown): object is DataView; - /** - * Returns `true` if the value is a built-in [`Date`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date) instance. - * - * ```js - * util.types.isDate(new Date()); // Returns true - * ``` - * @since v10.0.0 - */ - function isDate(object: unknown): object is Date; - /** - * Returns `true` if the value is a native `External` value. - * - * A native `External` value is a special type of object that contains a - * raw C++ pointer (`void*`) for access from native code, and has no other - * properties. Such objects are created either by Node.js internals or native - * addons. In JavaScript, they are [frozen](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/freeze) objects with a`null` prototype. - * - * ```c - * #include - * #include - * napi_value result; - * static napi_value MyNapi(napi_env env, napi_callback_info info) { - * int* raw = (int*) malloc(1024); - * napi_status status = napi_create_external(env, (void*) raw, NULL, NULL, &result); - * if (status != napi_ok) { - * napi_throw_error(env, NULL, "napi_create_external failed"); - * return NULL; - * } - * return result; - * } - * ... - * DECLARE_NAPI_PROPERTY("myNapi", MyNapi) - * ... - * ``` - * - * ```js - * const native = require('napi_addon.node'); - * const data = native.myNapi(); - * util.types.isExternal(data); // returns true - * util.types.isExternal(0); // returns false - * util.types.isExternal(new String('foo')); // returns false - * ``` - * - * For further information on `napi_create_external`, refer to `napi_create_external()`. - * @since v10.0.0 - */ - function isExternal(object: unknown): boolean; - /** - * Returns `true` if the value is a built-in [`Float32Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Float32Array) instance. - * - * ```js - * util.types.isFloat32Array(new ArrayBuffer()); // Returns false - * util.types.isFloat32Array(new Float32Array()); // Returns true - * util.types.isFloat32Array(new Float64Array()); // Returns false - * ``` - * @since v10.0.0 - */ - function isFloat32Array(object: unknown): object is Float32Array; - /** - * Returns `true` if the value is a built-in [`Float64Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Float64Array) instance. - * - * ```js - * util.types.isFloat64Array(new ArrayBuffer()); // Returns false - * util.types.isFloat64Array(new Uint8Array()); // Returns false - * util.types.isFloat64Array(new Float64Array()); // Returns true - * ``` - * @since v10.0.0 - */ - function isFloat64Array(object: unknown): object is Float64Array; - /** - * Returns `true` if the value is a generator function. - * This only reports back what the JavaScript engine is seeing; - * in particular, the return value may not match the original source code if - * a transpilation tool was used. - * - * ```js - * util.types.isGeneratorFunction(function foo() {}); // Returns false - * util.types.isGeneratorFunction(function* foo() {}); // Returns true - * ``` - * @since v10.0.0 - */ - function isGeneratorFunction(object: unknown): object is GeneratorFunction; - /** - * Returns `true` if the value is a generator object as returned from a - * built-in generator function. - * This only reports back what the JavaScript engine is seeing; - * in particular, the return value may not match the original source code if - * a transpilation tool was used. - * - * ```js - * function* foo() {} - * const generator = foo(); - * util.types.isGeneratorObject(generator); // Returns true - * ``` - * @since v10.0.0 - */ - function isGeneratorObject(object: unknown): object is Generator; - /** - * Returns `true` if the value is a built-in [`Int8Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Int8Array) instance. - * - * ```js - * util.types.isInt8Array(new ArrayBuffer()); // Returns false - * util.types.isInt8Array(new Int8Array()); // Returns true - * util.types.isInt8Array(new Float64Array()); // Returns false - * ``` - * @since v10.0.0 - */ - function isInt8Array(object: unknown): object is Int8Array; - /** - * Returns `true` if the value is a built-in [`Int16Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Int16Array) instance. - * - * ```js - * util.types.isInt16Array(new ArrayBuffer()); // Returns false - * util.types.isInt16Array(new Int16Array()); // Returns true - * util.types.isInt16Array(new Float64Array()); // Returns false - * ``` - * @since v10.0.0 - */ - function isInt16Array(object: unknown): object is Int16Array; - /** - * Returns `true` if the value is a built-in [`Int32Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Int32Array) instance. - * - * ```js - * util.types.isInt32Array(new ArrayBuffer()); // Returns false - * util.types.isInt32Array(new Int32Array()); // Returns true - * util.types.isInt32Array(new Float64Array()); // Returns false - * ``` - * @since v10.0.0 - */ - function isInt32Array(object: unknown): object is Int32Array; - /** - * Returns `true` if the value is a built-in [`Map`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map) instance. - * - * ```js - * util.types.isMap(new Map()); // Returns true - * ``` - * @since v10.0.0 - */ - function isMap( - object: T | {}, - ): object is T extends ReadonlyMap ? (unknown extends T ? never : ReadonlyMap) - : Map; - /** - * Returns `true` if the value is an iterator returned for a built-in [`Map`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map) instance. - * - * ```js - * const map = new Map(); - * util.types.isMapIterator(map.keys()); // Returns true - * util.types.isMapIterator(map.values()); // Returns true - * util.types.isMapIterator(map.entries()); // Returns true - * util.types.isMapIterator(map[Symbol.iterator]()); // Returns true - * ``` - * @since v10.0.0 - */ - function isMapIterator(object: unknown): boolean; /** - * Returns `true` if the value is an instance of a [Module Namespace Object](https://tc39.github.io/ecma262/#sec-module-namespace-exotic-objects). + * Gets and sets the type portion of the MIME. * * ```js - * import * as ns from './a.js'; + * import { MIMEType } from 'node:util'; * - * util.types.isModuleNamespaceObject(ns); // Returns true + * const myMIME = new MIMEType('text/javascript'); + * console.log(myMIME.type); + * // Prints: text + * myMIME.type = 'application'; + * console.log(myMIME.type); + * // Prints: application + * console.log(String(myMIME)); + * // Prints: application/javascript * ``` - * @since v10.0.0 */ - function isModuleNamespaceObject(value: unknown): boolean; + type: string; /** - * Returns `true` if the value was returned by the constructor of a [built-in `Error` type](https://tc39.es/ecma262/#sec-error-objects). + * Gets and sets the subtype portion of the MIME. * * ```js - * console.log(util.types.isNativeError(new Error())); // true - * console.log(util.types.isNativeError(new TypeError())); // true - * console.log(util.types.isNativeError(new RangeError())); // true - * ``` - * - * Subclasses of the native error types are also native errors: - * - * ```js - * class MyError extends Error {} - * console.log(util.types.isNativeError(new MyError())); // true - * ``` - * - * A value being `instanceof` a native error class is not equivalent to `isNativeError()`returning `true` for that value. `isNativeError()` returns `true` for errors - * which come from a different [realm](https://tc39.es/ecma262/#realm) while `instanceof Error` returns `false`for these errors: - * - * ```js - * const vm = require('node:vm'); - * const context = vm.createContext({}); - * const myError = vm.runInContext('new Error()', context); - * console.log(util.types.isNativeError(myError)); // true - * console.log(myError instanceof Error); // false - * ``` - * - * Conversely, `isNativeError()` returns `false` for all objects which were not - * returned by the constructor of a native error. That includes values - * which are `instanceof` native errors: - * - * ```js - * const myError = { __proto__: Error.prototype }; - * console.log(util.types.isNativeError(myError)); // false - * console.log(myError instanceof Error); // true - * ``` - * @since v10.0.0 - */ - function isNativeError(object: unknown): object is Error; - /** - * Returns `true` if the value is a number object, e.g. created - * by `new Number()`. - * - * ```js - * util.types.isNumberObject(0); // Returns false - * util.types.isNumberObject(new Number(0)); // Returns true - * ``` - * @since v10.0.0 - */ - function isNumberObject(object: unknown): object is Number; - /** - * Returns `true` if the value is a built-in [`Promise`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise). - * - * ```js - * util.types.isPromise(Promise.resolve(42)); // Returns true - * ``` - * @since v10.0.0 - */ - function isPromise(object: unknown): object is Promise; - /** - * Returns `true` if the value is a [`Proxy`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy) instance. - * - * ```js - * const target = {}; - * const proxy = new Proxy(target, {}); - * util.types.isProxy(target); // Returns false - * util.types.isProxy(proxy); // Returns true - * ``` - * @since v10.0.0 - */ - function isProxy(object: unknown): boolean; - /** - * Returns `true` if the value is a regular expression object. + * import { MIMEType } from 'node:util'; * - * ```js - * util.types.isRegExp(/abc/); // Returns true - * util.types.isRegExp(new RegExp('abc')); // Returns true + * const myMIME = new MIMEType('text/ecmascript'); + * console.log(myMIME.subtype); + * // Prints: ecmascript + * myMIME.subtype = 'javascript'; + * console.log(myMIME.subtype); + * // Prints: javascript + * console.log(String(myMIME)); + * // Prints: text/javascript * ``` - * @since v10.0.0 */ - function isRegExp(object: unknown): object is RegExp; + subtype: string; /** - * Returns `true` if the value is a built-in [`Set`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set) instance. + * Gets the essence of the MIME. This property is read only. + * Use `mime.type` or `mime.subtype` to alter the MIME. * * ```js - * util.types.isSet(new Set()); // Returns true - * ``` - * @since v10.0.0 - */ - function isSet( - object: T | {}, - ): object is T extends ReadonlySet ? (unknown extends T ? never : ReadonlySet) : Set; - /** - * Returns `true` if the value is an iterator returned for a built-in [`Set`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set) instance. + * import { MIMEType } from 'node:util'; * - * ```js - * const set = new Set(); - * util.types.isSetIterator(set.keys()); // Returns true - * util.types.isSetIterator(set.values()); // Returns true - * util.types.isSetIterator(set.entries()); // Returns true - * util.types.isSetIterator(set[Symbol.iterator]()); // Returns true + * const myMIME = new MIMEType('text/javascript;key=value'); + * console.log(myMIME.essence); + * // Prints: text/javascript + * myMIME.type = 'application'; + * console.log(myMIME.essence); + * // Prints: application/javascript + * console.log(String(myMIME)); + * // Prints: application/javascript;key=value * ``` - * @since v10.0.0 */ - function isSetIterator(object: unknown): boolean; + readonly essence: string; /** - * Returns `true` if the value is a built-in [`SharedArrayBuffer`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer) instance. - * This does _not_ include [`ArrayBuffer`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer) instances. Usually, it is - * desirable to test for both; See `util.types.isAnyArrayBuffer()` for that. - * - * ```js - * util.types.isSharedArrayBuffer(new ArrayBuffer()); // Returns false - * util.types.isSharedArrayBuffer(new SharedArrayBuffer()); // Returns true - * ``` - * @since v10.0.0 + * Gets the `MIMEParams` object representing the + * parameters of the MIME. This property is read-only. See `MIMEParams` documentation for details. */ - function isSharedArrayBuffer(object: unknown): object is SharedArrayBuffer; + readonly params: MIMEParams; /** - * Returns `true` if the value is a string object, e.g. created - * by `new String()`. + * The `toString()` method on the `MIMEType` object returns the serialized MIME. * - * ```js - * util.types.isStringObject('foo'); // Returns false - * util.types.isStringObject(new String('foo')); // Returns true - * ``` - * @since v10.0.0 + * Because of the need for standard compliance, this method does not allow users + * to customize the serialization process of the MIME. */ - function isStringObject(object: unknown): object is String; + toString(): string; + } + /** + * The `MIMEParams` API provides read and write access to the parameters of a`MIMEType`. + * @since v19.1.0, v18.13.0 + */ + export class MIMEParams { /** - * Returns `true` if the value is a symbol object, created - * by calling `Object()` on a `Symbol` primitive. - * - * ```js - * const symbol = Symbol('foo'); - * util.types.isSymbolObject(symbol); // Returns false - * util.types.isSymbolObject(Object(symbol)); // Returns true - * ``` - * @since v10.0.0 + * Remove all name-value pairs whose name is `name`. */ - function isSymbolObject(object: unknown): object is Symbol; + delete(name: string): void; /** - * Returns `true` if the value is a built-in [`TypedArray`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray) instance. - * - * ```js - * util.types.isTypedArray(new ArrayBuffer()); // Returns false - * util.types.isTypedArray(new Uint8Array()); // Returns true - * util.types.isTypedArray(new Float64Array()); // Returns true - * ``` - * - * See also [`ArrayBuffer.isView()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer/isView). - * @since v10.0.0 + * Returns an iterator over each of the name-value pairs in the parameters. + * Each item of the iterator is a JavaScript `Array`. The first item of the array + * is the `name`, the second item of the array is the `value`. */ - function isTypedArray(object: unknown): object is NodeJS.TypedArray; + entries(): IterableIterator<[name: string, value: string]>; /** - * Returns `true` if the value is a built-in [`Uint8Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint8Array) instance. - * - * ```js - * util.types.isUint8Array(new ArrayBuffer()); // Returns false - * util.types.isUint8Array(new Uint8Array()); // Returns true - * util.types.isUint8Array(new Float64Array()); // Returns false - * ``` - * @since v10.0.0 + * Returns the value of the first name-value pair whose name is `name`. If there + * are no such pairs, `null` is returned. + * @return or `null` if there is no name-value pair with the given `name`. */ - function isUint8Array(object: unknown): object is Uint8Array; + get(name: string): string | null; /** - * Returns `true` if the value is a built-in [`Uint8ClampedArray`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint8ClampedArray) instance. - * - * ```js - * util.types.isUint8ClampedArray(new ArrayBuffer()); // Returns false - * util.types.isUint8ClampedArray(new Uint8ClampedArray()); // Returns true - * util.types.isUint8ClampedArray(new Float64Array()); // Returns false - * ``` - * @since v10.0.0 + * Returns `true` if there is at least one name-value pair whose name is `name`. */ - function isUint8ClampedArray(object: unknown): object is Uint8ClampedArray; + has(name: string): boolean; /** - * Returns `true` if the value is a built-in [`Uint16Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint16Array) instance. + * Returns an iterator over the names of each name-value pair. * * ```js - * util.types.isUint16Array(new ArrayBuffer()); // Returns false - * util.types.isUint16Array(new Uint16Array()); // Returns true - * util.types.isUint16Array(new Float64Array()); // Returns false - * ``` - * @since v10.0.0 - */ - function isUint16Array(object: unknown): object is Uint16Array; - /** - * Returns `true` if the value is a built-in [`Uint32Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint32Array) instance. + * import { MIMEType } from 'node:util'; * - * ```js - * util.types.isUint32Array(new ArrayBuffer()); // Returns false - * util.types.isUint32Array(new Uint32Array()); // Returns true - * util.types.isUint32Array(new Float64Array()); // Returns false + * const { params } = new MIMEType('text/plain;foo=0;bar=1'); + * for (const name of params.keys()) { + * console.log(name); + * } + * // Prints: + * // foo + * // bar * ``` - * @since v10.0.0 */ - function isUint32Array(object: unknown): object is Uint32Array; + keys(): IterableIterator; /** - * Returns `true` if the value is a built-in [`WeakMap`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WeakMap) instance. + * Sets the value in the `MIMEParams` object associated with `name` to`value`. If there are any pre-existing name-value pairs whose names are `name`, + * set the first such pair's value to `value`. * * ```js - * util.types.isWeakMap(new WeakMap()); // Returns true - * ``` - * @since v10.0.0 - */ - function isWeakMap(object: unknown): object is WeakMap; - /** - * Returns `true` if the value is a built-in [`WeakSet`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WeakSet) instance. + * import { MIMEType } from 'node:util'; * - * ```js - * util.types.isWeakSet(new WeakSet()); // Returns true + * const { params } = new MIMEType('text/plain;foo=0;bar=1'); + * params.set('foo', 'def'); + * params.set('baz', 'xyz'); + * console.log(params.toString()); + * // Prints: foo=def;bar=1;baz=xyz * ``` - * @since v10.0.0 */ - function isWeakSet(object: unknown): object is WeakSet; + set(name: string, value: string): void; /** - * Returns `true` if `value` is a `KeyObject`, `false` otherwise. - * @since v16.2.0 + * Returns an iterator over the values of each name-value pair. */ - function isKeyObject(object: unknown): object is KeyObject; + values(): IterableIterator; /** - * Returns `true` if `value` is a `CryptoKey`, `false` otherwise. - * @since v16.2.0 + * Returns an iterator over each of the name-value pairs in the parameters. */ - function isCryptoKey(object: unknown): object is webcrypto.CryptoKey; + [Symbol.iterator]: typeof MIMEParams.prototype.entries; + } +} +declare module "util/types" { + import { KeyObject, webcrypto } from "node:crypto"; + /** + * Returns `true` if the value is a built-in [`ArrayBuffer`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer) or + * [`SharedArrayBuffer`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer) instance. + * + * See also `util.types.isArrayBuffer()` and `util.types.isSharedArrayBuffer()`. + * + * ```js + * util.types.isAnyArrayBuffer(new ArrayBuffer()); // Returns true + * util.types.isAnyArrayBuffer(new SharedArrayBuffer()); // Returns true + * ``` + * @since v10.0.0 + */ + function isAnyArrayBuffer(object: unknown): object is ArrayBufferLike; + /** + * Returns `true` if the value is an `arguments` object. + * + * ```js + * function foo() { + * util.types.isArgumentsObject(arguments); // Returns true + * } + * ``` + * @since v10.0.0 + */ + function isArgumentsObject(object: unknown): object is IArguments; + /** + * Returns `true` if the value is a built-in [`ArrayBuffer`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer) instance. + * This does _not_ include [`SharedArrayBuffer`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer) instances. Usually, it is + * desirable to test for both; See `util.types.isAnyArrayBuffer()` for that. + * + * ```js + * util.types.isArrayBuffer(new ArrayBuffer()); // Returns true + * util.types.isArrayBuffer(new SharedArrayBuffer()); // Returns false + * ``` + * @since v10.0.0 + */ + function isArrayBuffer(object: unknown): object is ArrayBuffer; + /** + * Returns `true` if the value is an instance of one of the [`ArrayBuffer`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer) views, such as typed + * array objects or [`DataView`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/DataView). Equivalent to + * [`ArrayBuffer.isView()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer/isView). + * + * ```js + * util.types.isArrayBufferView(new Int8Array()); // true + * util.types.isArrayBufferView(Buffer.from('hello world')); // true + * util.types.isArrayBufferView(new DataView(new ArrayBuffer(16))); // true + * util.types.isArrayBufferView(new ArrayBuffer()); // false + * ``` + * @since v10.0.0 + */ + function isArrayBufferView(object: unknown): object is NodeJS.ArrayBufferView; + /** + * Returns `true` if the value is an [async function](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/async_function). + * This only reports back what the JavaScript engine is seeing; + * in particular, the return value may not match the original source code if + * a transpilation tool was used. + * + * ```js + * util.types.isAsyncFunction(function foo() {}); // Returns false + * util.types.isAsyncFunction(async function foo() {}); // Returns true + * ``` + * @since v10.0.0 + */ + function isAsyncFunction(object: unknown): boolean; + /** + * Returns `true` if the value is a `BigInt64Array` instance. + * + * ```js + * util.types.isBigInt64Array(new BigInt64Array()); // Returns true + * util.types.isBigInt64Array(new BigUint64Array()); // Returns false + * ``` + * @since v10.0.0 + */ + function isBigInt64Array(value: unknown): value is BigInt64Array; + /** + * Returns `true` if the value is a `BigUint64Array` instance. + * + * ```js + * util.types.isBigUint64Array(new BigInt64Array()); // Returns false + * util.types.isBigUint64Array(new BigUint64Array()); // Returns true + * ``` + * @since v10.0.0 + */ + function isBigUint64Array(value: unknown): value is BigUint64Array; + /** + * Returns `true` if the value is a boolean object, e.g. created + * by `new Boolean()`. + * + * ```js + * util.types.isBooleanObject(false); // Returns false + * util.types.isBooleanObject(true); // Returns false + * util.types.isBooleanObject(new Boolean(false)); // Returns true + * util.types.isBooleanObject(new Boolean(true)); // Returns true + * util.types.isBooleanObject(Boolean(false)); // Returns false + * util.types.isBooleanObject(Boolean(true)); // Returns false + * ``` + * @since v10.0.0 + */ + function isBooleanObject(object: unknown): object is boolean; + /** + * Returns `true` if the value is any boxed primitive object, e.g. created + * by `new Boolean()`, `new String()` or `Object(Symbol())`. + * + * For example: + * + * ```js + * util.types.isBoxedPrimitive(false); // Returns false + * util.types.isBoxedPrimitive(new Boolean(false)); // Returns true + * util.types.isBoxedPrimitive(Symbol('foo')); // Returns false + * util.types.isBoxedPrimitive(Object(Symbol('foo'))); // Returns true + * util.types.isBoxedPrimitive(Object(BigInt(5))); // Returns true + * ``` + * @since v10.11.0 + */ + function isBoxedPrimitive( + object: unknown, + ): object is string | number | bigint | boolean | symbol; + /** + * Returns `true` if the value is a built-in [`DataView`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/DataView) instance. + * + * ```js + * const ab = new ArrayBuffer(20); + * util.types.isDataView(new DataView(ab)); // Returns true + * util.types.isDataView(new Float64Array()); // Returns false + * ``` + * + * See also [`ArrayBuffer.isView()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer/isView). + * @since v10.0.0 + */ + function isDataView(object: unknown): object is DataView; + /** + * Returns `true` if the value is a built-in [`Date`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date) instance. + * + * ```js + * util.types.isDate(new Date()); // Returns true + * ``` + * @since v10.0.0 + */ + function isDate(object: unknown): object is Date; + /** + * Returns `true` if the value is a native `External` value. + * + * A native `External` value is a special type of object that contains a + * raw C++ pointer (`void*`) for access from native code, and has no other + * properties. Such objects are created either by Node.js internals or native + * addons. In JavaScript, they are [frozen](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/freeze) objects with a`null` prototype. + * + * ```c + * #include + * #include + * napi_value result; + * static napi_value MyNapi(napi_env env, napi_callback_info info) { + * int* raw = (int*) malloc(1024); + * napi_status status = napi_create_external(env, (void*) raw, NULL, NULL, &result); + * if (status != napi_ok) { + * napi_throw_error(env, NULL, "napi_create_external failed"); + * return NULL; + * } + * return result; + * } + * ... + * DECLARE_NAPI_PROPERTY("myNapi", MyNapi) + * ... + * ``` + * + * ```js + * const native = require('napi_addon.node'); + * const data = native.myNapi(); + * util.types.isExternal(data); // returns true + * util.types.isExternal(0); // returns false + * util.types.isExternal(new String('foo')); // returns false + * ``` + * + * For further information on `napi_create_external`, refer to `napi_create_external()`. + * @since v10.0.0 + */ + function isExternal(object: unknown): boolean; + /** + * Returns `true` if the value is a built-in [`Float32Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Float32Array) instance. + * + * ```js + * util.types.isFloat32Array(new ArrayBuffer()); // Returns false + * util.types.isFloat32Array(new Float32Array()); // Returns true + * util.types.isFloat32Array(new Float64Array()); // Returns false + * ``` + * @since v10.0.0 + */ + function isFloat32Array(object: unknown): object is Float32Array; + /** + * Returns `true` if the value is a built-in [`Float64Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Float64Array) instance. + * + * ```js + * util.types.isFloat64Array(new ArrayBuffer()); // Returns false + * util.types.isFloat64Array(new Uint8Array()); // Returns false + * util.types.isFloat64Array(new Float64Array()); // Returns true + * ``` + * @since v10.0.0 + */ + function isFloat64Array(object: unknown): object is Float64Array; + /** + * Returns `true` if the value is a generator function. + * This only reports back what the JavaScript engine is seeing; + * in particular, the return value may not match the original source code if + * a transpilation tool was used. + * + * ```js + * util.types.isGeneratorFunction(function foo() {}); // Returns false + * util.types.isGeneratorFunction(function* foo() {}); // Returns true + * ``` + * @since v10.0.0 + */ + function isGeneratorFunction(object: unknown): object is GeneratorFunction; + /** + * Returns `true` if the value is a generator object as returned from a + * built-in generator function. + * This only reports back what the JavaScript engine is seeing; + * in particular, the return value may not match the original source code if + * a transpilation tool was used. + * + * ```js + * function* foo() {} + * const generator = foo(); + * util.types.isGeneratorObject(generator); // Returns true + * ``` + * @since v10.0.0 + */ + function isGeneratorObject(object: unknown): object is Generator; + /** + * Returns `true` if the value is a built-in [`Int8Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Int8Array) instance. + * + * ```js + * util.types.isInt8Array(new ArrayBuffer()); // Returns false + * util.types.isInt8Array(new Int8Array()); // Returns true + * util.types.isInt8Array(new Float64Array()); // Returns false + * ``` + * @since v10.0.0 + */ + function isInt8Array(object: unknown): object is Int8Array; + /** + * Returns `true` if the value is a built-in [`Int16Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Int16Array) instance. + * + * ```js + * util.types.isInt16Array(new ArrayBuffer()); // Returns false + * util.types.isInt16Array(new Int16Array()); // Returns true + * util.types.isInt16Array(new Float64Array()); // Returns false + * ``` + * @since v10.0.0 + */ + function isInt16Array(object: unknown): object is Int16Array; + /** + * Returns `true` if the value is a built-in [`Int32Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Int32Array) instance. + * + * ```js + * util.types.isInt32Array(new ArrayBuffer()); // Returns false + * util.types.isInt32Array(new Int32Array()); // Returns true + * util.types.isInt32Array(new Float64Array()); // Returns false + * ``` + * @since v10.0.0 + */ + function isInt32Array(object: unknown): object is Int32Array; + /** + * Returns `true` if the value is a built-in [`Map`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map) instance. + * + * ```js + * util.types.isMap(new Map()); // Returns true + * ``` + * @since v10.0.0 + */ + function isMap( + object: T | object, + ): object is T extends ReadonlyMap + ? unknown extends T + ? never + : ReadonlyMap + : Map; + /** + * Returns `true` if the value is an iterator returned for a built-in [`Map`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map) instance. + * + * ```js + * const map = new Map(); + * util.types.isMapIterator(map.keys()); // Returns true + * util.types.isMapIterator(map.values()); // Returns true + * util.types.isMapIterator(map.entries()); // Returns true + * util.types.isMapIterator(map[Symbol.iterator]()); // Returns true + * ``` + * @since v10.0.0 + */ + function isMapIterator(object: unknown): boolean; + /** + * Returns `true` if the value is an instance of a [Module Namespace Object](https://tc39.github.io/ecma262/#sec-module-namespace-exotic-objects). + * + * ```js + * import * as ns from './a.js'; + * + * util.types.isModuleNamespaceObject(ns); // Returns true + * ``` + * @since v10.0.0 + */ + function isModuleNamespaceObject(value: unknown): boolean; + /** + * Returns `true` if the value was returned by the constructor of a [built-in `Error` type](https://tc39.es/ecma262/#sec-error-objects). + * + * ```js + * console.log(util.types.isNativeError(new Error())); // true + * console.log(util.types.isNativeError(new TypeError())); // true + * console.log(util.types.isNativeError(new RangeError())); // true + * ``` + * + * Subclasses of the native error types are also native errors: + * + * ```js + * class MyError extends Error object + * console.log(util.types.isNativeError(new MyError())); // true + * ``` + * + * A value being `instanceof` a native error class is not equivalent to `isNativeError()`returning `true` for that value. `isNativeError()` returns `true` for errors + * which come from a different [realm](https://tc39.es/ecma262/#realm) while `instanceof Error` returns `false`for these errors: + * + * ```js + * const vm = require('node:vm'); + * const context = vm.createContext(object); + * const myError = vm.runInContext('new Error()', context); + * console.log(util.types.isNativeError(myError)); // true + * console.log(myError instanceof Error); // false + * ``` + * + * Conversely, `isNativeError()` returns `false` for all objects which were not + * returned by the constructor of a native error. That includes values + * which are `instanceof` native errors: + * + * ```js + * const myError = { __proto__: Error.prototype }; + * console.log(util.types.isNativeError(myError)); // false + * console.log(myError instanceof Error); // true + * ``` + * @since v10.0.0 + */ + function isNativeError(object: unknown): object is Error; + /** + * Returns `true` if the value is a number object, e.g. created + * by `new Number()`. + * + * ```js + * util.types.isNumberObject(0); // Returns false + * util.types.isNumberObject(new Number(0)); // Returns true + * ``` + * @since v10.0.0 + */ + function isNumberObject(object: unknown): object is number; + /** + * Returns `true` if the value is a built-in [`Promise`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise). + * + * ```js + * util.types.isPromise(Promise.resolve(42)); // Returns true + * ``` + * @since v10.0.0 + */ + function isPromise(object: unknown): object is Promise; + /** + * Returns `true` if the value is a [`Proxy`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy) instance. + * + * ```js + * const target = {}; + * const proxy = new Proxy(target, {}); + * util.types.isProxy(target); // Returns false + * util.types.isProxy(proxy); // Returns true + * ``` + * @since v10.0.0 + */ + function isProxy(object: unknown): boolean; + /** + * Returns `true` if the value is a regular expression object. + * + * ```js + * util.types.isRegExp(/abc/); // Returns true + * util.types.isRegExp(new RegExp('abc')); // Returns true + * ``` + * @since v10.0.0 + */ + function isRegExp(object: unknown): object is RegExp; + /** + * Returns `true` if the value is a built-in [`Set`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set) instance. + * + * ```js + * util.types.isSet(new Set()); // Returns true + * ``` + * @since v10.0.0 + */ + function isSet( + object: T | object, + ): object is T extends ReadonlySet + ? unknown extends T + ? never + : ReadonlySet + : Set; + /** + * Returns `true` if the value is an iterator returned for a built-in [`Set`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set) instance. + * + * ```js + * const set = new Set(); + * util.types.isSetIterator(set.keys()); // Returns true + * util.types.isSetIterator(set.values()); // Returns true + * util.types.isSetIterator(set.entries()); // Returns true + * util.types.isSetIterator(set[Symbol.iterator]()); // Returns true + * ``` + * @since v10.0.0 + */ + function isSetIterator(object: unknown): boolean; + /** + * Returns `true` if the value is a built-in [`SharedArrayBuffer`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer) instance. + * This does _not_ include [`ArrayBuffer`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer) instances. Usually, it is + * desirable to test for both; See `util.types.isAnyArrayBuffer()` for that. + * + * ```js + * util.types.isSharedArrayBuffer(new ArrayBuffer()); // Returns false + * util.types.isSharedArrayBuffer(new SharedArrayBuffer()); // Returns true + * ``` + * @since v10.0.0 + */ + function isSharedArrayBuffer(object: unknown): object is SharedArrayBuffer; + /** + * Returns `true` if the value is a string object, e.g. created + * by `new String()`. + * + * ```js + * util.types.isStringObject('foo'); // Returns false + * util.types.isStringObject(new String('foo')); // Returns true + * ``` + * @since v10.0.0 + */ + function isStringObject(object: unknown): object is string; + /** + * Returns `true` if the value is a symbol object, created + * by calling `Object()` on a `Symbol` primitive. + * + * ```js + * const symbol = Symbol('foo'); + * util.types.isSymbolObject(symbol); // Returns false + * util.types.isSymbolObject(Object(symbol)); // Returns true + * ``` + * @since v10.0.0 + */ + function isSymbolObject(object: unknown): object is symbol; + /** + * Returns `true` if the value is a built-in [`TypedArray`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray) instance. + * + * ```js + * util.types.isTypedArray(new ArrayBuffer()); // Returns false + * util.types.isTypedArray(new Uint8Array()); // Returns true + * util.types.isTypedArray(new Float64Array()); // Returns true + * ``` + * + * See also [`ArrayBuffer.isView()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer/isView). + * @since v10.0.0 + */ + function isTypedArray(object: unknown): object is NodeJS.TypedArray; + /** + * Returns `true` if the value is a built-in [`Uint8Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint8Array) instance. + * + * ```js + * util.types.isUint8Array(new ArrayBuffer()); // Returns false + * util.types.isUint8Array(new Uint8Array()); // Returns true + * util.types.isUint8Array(new Float64Array()); // Returns false + * ``` + * @since v10.0.0 + */ + function isUint8Array(object: unknown): object is Uint8Array; + /** + * Returns `true` if the value is a built-in [`Uint8ClampedArray`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint8ClampedArray) instance. + * + * ```js + * util.types.isUint8ClampedArray(new ArrayBuffer()); // Returns false + * util.types.isUint8ClampedArray(new Uint8ClampedArray()); // Returns true + * util.types.isUint8ClampedArray(new Float64Array()); // Returns false + * ``` + * @since v10.0.0 + */ + function isUint8ClampedArray(object: unknown): object is Uint8ClampedArray; + /** + * Returns `true` if the value is a built-in [`Uint16Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint16Array) instance. + * + * ```js + * util.types.isUint16Array(new ArrayBuffer()); // Returns false + * util.types.isUint16Array(new Uint16Array()); // Returns true + * util.types.isUint16Array(new Float64Array()); // Returns false + * ``` + * @since v10.0.0 + */ + function isUint16Array(object: unknown): object is Uint16Array; + /** + * Returns `true` if the value is a built-in [`Uint32Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint32Array) instance. + * + * ```js + * util.types.isUint32Array(new ArrayBuffer()); // Returns false + * util.types.isUint32Array(new Uint32Array()); // Returns true + * util.types.isUint32Array(new Float64Array()); // Returns false + * ``` + * @since v10.0.0 + */ + function isUint32Array(object: unknown): object is Uint32Array; + /** + * Returns `true` if the value is a built-in [`WeakMap`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WeakMap) instance. + * + * ```js + * util.types.isWeakMap(new WeakMap()); // Returns true + * ``` + * @since v10.0.0 + */ + function isWeakMap(object: unknown): object is WeakMap; + /** + * Returns `true` if the value is a built-in [`WeakSet`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WeakSet) instance. + * + * ```js + * util.types.isWeakSet(new WeakSet()); // Returns true + * ``` + * @since v10.0.0 + */ + function isWeakSet(object: unknown): object is WeakSet; + /** + * Returns `true` if `value` is a `KeyObject`, `false` otherwise. + * @since v16.2.0 + */ + function isKeyObject(object: unknown): object is KeyObject; + /** + * Returns `true` if `value` is a `CryptoKey`, `false` otherwise. + * @since v16.2.0 + */ + function isCryptoKey(object: unknown): object is webcrypto.CryptoKey; } declare module "node:util" { - export * from "util"; + export * from "util"; } declare module "node:util/types" { - export * from "util/types"; + export * from "util/types"; }